We Tried Ketones And This Is What Happened | GCN Does Science

[@bergerniklas6647]

I always love when Oli gets let loose and can show of his past as a Phd Organic Chemist. He actually knows what is going on instead of just reading something and reciting it.

[@izylldus]

Yep, GCN tolerating science and letting the nerd in Ollie loose. I wonder if this is the reason he opted out of cycling/marketing weekly. 😂

[@jan4946]

If only they'd use just slightly more scientific titles for their videos instead of these clickbaity ones. What about "We tested the effects of ketones on a short climb and only found minor improvements"?

[@rezoanalom9732]

@@jan4946 To be honest, your alternative title kind of spoils the video. Sure, it's more accurate, but it makes the video less entertaining, because the results are already spoiled. This is after all, a video that is supposed to be entertaining as well as being informative, as opposed to a study, which has the sole purpose of being informative. Also, the title isn't overly clickbaity. It's not like it's: "We tested ketones, and the results SHOCKED us!!!"

[@glenn7095]

@@rezoanalom9732 you hit the nail on the head with your click baity title. As soon as i read it i got angry ;)

[@MrHummerle]

Can't tell if this is totally my style of sarcasm or just a plain talk about him..

[@mnbv5555cxz]

LOVE the content - more 'Ollie does chemistry" please

[@petinka721]

Ollie going after them one by one! Soon he beated them all at GCN. The boss tremble now.

[@maxredburn6610]

...after Opie left

[@Juan0003]

No way he can beat an ebike!

[@anthonyzee6578]

@@maxredburn6610 Chris posted 47:30 on his Video with more power... make you wonder where they were counting from. kzbin.info/www/bejne/j5LSooOwedmFmNU

[@petinka721]

@@anthonyzee6578 Chris was not a climber. Ollie has good power to Weight I think.

[@stevek8829]

@@Juan0003 Even my Harley can beat an ebike.

[@djayjp]

"Exogenous carbohydrates": aka eating.

[@TheHondamayhem]

Hank is the kind of friend who would never let you come up with a stupid idea and complete it alone! What a legend

[@llandor]

You really should start selling GCN branded towels, judging by the amount of spillage under Hank (not to mention under Simon's bike under the virtual Ronde)

[@troycollett8540]

llandor they sell towels

[@llandor]

@@troycollett8540 To be fair I was thinking they already did, but not using them and instead getting salty water over their fancy bikes (not to mention carpet/floors), that's just not taking care of your posessions (and using a towel would've reminded me to get one)

[@dollarize6412]

@@llandor this is a good point. There is probably dramatic value in them sweating all over the place, makes the workouts looks genuine and difficult, which they are, but I would agree that outside of that you definitely want to keep all that sweat off your fancy equipment.

[@ltu42]

@@llandor That's the thing, they don't own the fancy equipment they're using. They haven't paid for it and they're not going to keep it.

[@ivarbrouwer197]

That and a GCN training mat.

[@mikemarinojax]

I was all-in on ketones until the end, when Ollie revealed the price. I guess I'll continue to use pancake syrup.

[@AllanPhillips]

I think pancake syrup will taste a lot better too.

[@lucasrobinson4577]

Have a look at MCT oil. It's the same thing at around $15/16oz at whole foods.

[@sk1ppercat912]

Lucas Robinson not the same thing. Similar. Your body still needs to break down the MCFA. The idea of these are you skip the break down step. It actually takes carbs to metabolize fat. Physiologist say “fats burn in the flame of carbs” so when taking MCFA you still need some carbs for the metabolism. With ketones you don’t need any carbohydrate. Wouldn’t it be nice though.

[@TheCatAteMyShoe]

Same here. $89 is waaaaaayyyyy out of my budget. I'll stick with Hammer Nutrition gel.

[@andrewwilson888]

Just make sure that's pure maple pancake syrup eh? ;)

[@mopedvieh]

I love when scientific Ollie is activated 😂

[@KenSmith-bv4si]

Hi Olie , Ken here , I used to work in a Phenolic resins plant as a lab tech , we used MEK (Methal Ethel Keaton) to clean the lab glassware .

[@adamlynch9153]

US citizen here: I’m glad cycling and soccer are so popular in England cause the American you-tubers are not very funny typically. It makes learning about things much more enjoyable.

[@alfredhitchcock45]

Who says the Brits are funny?

[@adamlynch9153]

@@alfredhitchcock45 they def funny

[@jamaly77]

​@@alfredhitchcock45Brexit continues to produce funny effects for the uk.

[@PedigreeMonkey]

I love you doing pre- and recaps more often recently! Thats production Quality! …. And I love you wearing your "science-glasses"!

[@elzy133]

I have hypothyroid AND ADHD. Ketones helps me with feeling normal due to having more energy, puts me in a positive mindset, and somehow it helps with my ADHD. I’ve also heard other people that have ADHD were able to drop their medication for it due to taking ketones. I’ve never taken meds for it, but it absolutely helps.

[@doxasnob8137]

Ollie, you are the best! Your brains are showing, and its great. Love your approach, keep up the great work. I teach some complicated and involved topics and a laugh while you are doing it makes it go down so much easier. I had some good laughs here and learned, finally, what this keto thing is all about.

[@jcolterh]

Next do a Bicycle Day special. Recreate the day Albert Hoffman discovered LSD and rode his bike tripping on the first acid trip.

[@Isaax]

You were talking about how you felt more positive and ready towards the exercise - this is me on keto all the time. To be fair, it was coming from a very high carb diet with lots of processed garbage, so improvement was guaranteed, but keto for people like me really is a life changer

[@jonbanks245]

Just had to explain to my other half that "bonking on the bike " was nothing to do with having sex while riding.

[@singlespeedchronicles7640]

It doesn't??? I guess I've been doing it all wrong, then

[@SurerHat]

Probably worth noting the car engine analogy is actually the wrong way around. The internal combustion engine is most efficient at steady speeds whereas the electric motor is used to accelerate up to speed! The limited capacity of a Prius battery fits pretty well with limited glycogen stores in a human as well.

[@austinshoupe3003]

Pierre Receveaux to my knowledge, priuses aren’t set up like that.

[@Hardcaslte]

It's actually opposite, I have a Hybrid Ford Fusion and the best use of the battery is for steady rolling. You want to use the engine in a limited capacity to accelerate (aka don't floor it) and then when you get up to speed it switches over to battery power to keep the car rolling. That's because it takes a lot of power to accelerate a vehicle, but once you're up to speed it doesn't take much power to keep it moving forward, just like in cycling or anything else. The limitation here is high speed, because let's say at 75MPH the battery doesn't have enough power to hold that speed for more than a very short time, while anything 45MPH or under it can roll on battery power for a good 1+ miles without help from the motor.

[@austinshoupe3003]

The confusion comes about because purpose built electric vehicles are quicker to accelerate than ice vehicles. You have instant toque because nothing has to spin up. But as was said above, there are power limits to what a hybrid can put out electronically since it was designed for two system to cooperate.

[@ellenorbjornsdottir1166]

@@austinshoupe3003 Priuses are set up to use mixed power for high speed acceleration, and flip between electric and gas for low speed (30mph) cruising.

[@MachielG]

Great work Ollie and Hank. The video I've been waiting for!

[@TheBassallyear100]

I'm most impressed that Ollie called it a magazine!

[@nfkb0]

Hello guys, I am a French MD loving sport physiology and triathlon. First I have to say that I enjoy your videos on my turbo-trainer :) Here I have read all 406 comments before commenting myself :) I have no special diet and don't believe in constrained diets for my well being. After a lot of reading I have tinkered with ketones in 2019. It was especially fun to have some experience with it before the hype during the TdF. It gave me some contacts to discuss it with a manufacturer, press and colleagues. I think the safety profile is ok. What work best for me was the recovery. I took a small amount before going to bed. Take a full dose like you did before an all out effort is not a great idea (but I did this mistake the first time I took some too !!) because there is a risk of hypoglycemia. I tried to take a good amount of carbs (like 2 gels) 45 minutes before the start of a 70.3 triathlon and then 30g KE4 30 min before the start with a good flush of sparkling water to wash out the after taste. The protocol was better for me. I did this for curiosity sake since I am mid-pack athlete and feel I have nothing to prove to anyone. The debate around ketones being a PED or not is real question. (In my opinion it lacks the dangerous for health aspect) I hope people shouting against the use of ketones also avoid any form of cafeine around training ;) Also ketones was a subject under scrutiny last year, maybe it has diverted attention from real dangerous PEDs still in use in the world of sports ? I do not stick with its usage because of the complexity of getting some in France and the ridiculous price. I guess you block url in the comments but using deepL or google translate you can read my experience on nfkb0 dot com search ketone www.nfkb0.com/?s=ketone PS this video is not opened to contribution to captions

[@ahnnahargrove1354]

Very funny in English as well as in French.. Bravo... l'amour avec l'humour...

[@marcuspartridge11]

Makes me laugh every time Olie does his American accent! BTW, we know what petrol is haha (well, some of us do)

[@michaelb1761]

Just don't call it Benzene. Only Germans and Rammstein fans will understand then.

[@seahog32]

@@michaelb1761 That would be benzin. Benzen(e) is a completely different thing.

[@Bertos13]

Was satisfied with my 1h11m but now... 90+ rpm? 300w?? Damn. Hats off, mate.

[@mitchellsteindler]

Why is 90+ rpm impressive?

[@Bertos13]

@@mitchellsteindler Because he must have done this on a pretty high gear while being disciplined to maintain that cadence. Can't imagine doing this on the smallest gear. I'm doing Zwift for about 5/6 months now and climbed the Alpe 5 times. Each time I struggle in finding a good rhythm... Which is embarrassing because I already am riding a compact (50/34 & 11/28). Often find myself grinding, reaching 70/75 rpm at most. Personal goal is to climb it within an hour. 45min.. I can only dream that haha.

[@cristiansmochina9056]

@@Bertos13 Ditch that 11-28 and get a mountain bike cassette 11-36. I never understood why road bike have to have greater than 1 gear ratios as the smallest ratio. Not everybody weighs 60 kilos and produces 400 watts.

[@Stumpy77]

@@cristiansmochina9056 Because roadies. 23T used to be lowest sprocket in the mountain stages of the tour for the pros. Only very recently has cadence been shown to be effective - thanks Lance for that.

[@beeble2003]

@@Stumpy77 Except cadence is only *that* effective if you have an, um, artificially enhanced cardiovascular system. Unless you're putting out fairly serious power, there's not actually a huge advantage to higher cadences.

[@erikhilsinger9421]

Pro tip- the finger poker needle goes in the sides of your fingers where there are much fewer nerves than the pads.

[@adammillsindustries.]

Those are the two hardest workers at GCN.

[@albertokusmic9239]

Competence and inherent aptitude to explaining tricky topics. Bravo!

[@robertsmme]

Enjoyed the detail and Ollie doing well.

[@jeffng1306]

What was the post ride ketones level??

[@Spracker]

Right? They're blowing it not testing that and showing the results.

[@petef15]

Damn if they'd done one day where they took the ketones, waited 4 hours, then tested them. Then another day where they took ketones, waited 4 hours and also did the ride and tested them, that could have really shown us if they were 'used up' at all. My guess is that they barely used them by averaging 300w. They should have done at least a 2 hour ride which was mainly in endurance zones with a harder effort of maybe 20min before the end.

[@Ystadcop]

Ketones? I was their drummer in the 60s. I think.

[@mitchellsteindler]

"I think". I feel that's accurate for the 60s

[@Ystadcop]

@@mitchellsteindler Mitch, I know I was there, my birth certificate is proof. But....

[@tonycrabtree3416]

Ystadcop HA! Winning comment today.

[@MrStu829]

Interesting trial. I'm on a Keto diet and can vouch for improvements in energy and other benefits. Your body does need to adapt to using Ketones on a cellular level over time however so I'm not sure of the validity of taking ketones and getting an immediate return from them when not adapted. Love GCN. Another great video !!!

[@isapixs8251]

I‘m on ketogenic diet too. Never felt this good before. Since then, I never had problems with low blood sugar again. Before, I had hypoglycemia on almost every ride.

[@dwebb1935]

Ah, hence why they didn't get the Popeye or Hulk effect in their muskles. I wonder if Hank and Ollie would consider changing the experiment to ingesting ketones for a longer duration, say several weeks, if a ketone-manufacturer sponsored them. Or would they decline on account of the taste of the swill? Questions, questions.

[@TheNovaNorm]

You forgot to mention the hour record attempt. Great video, thanks.

[@Retnee]

Oh this is brilliant. While GCN Does Science I get an ad showing how someone got a bracelet and had a wonderful life, lost a bracelet and their life was terrible, then turned to Feng Shui so they could hock me a bracelet which has "powerful" stones. Such wonderful irony... (I admit I didn't watch all 5+ minutes of blather on the add, but there is an ad I clicked on to see what was actually being sold. Hurry.. it's a sale!)

[@sabastanknight6168]

Ollie ollie ollie !!! Welcome back, that was an interesting and entertaining video. Props to beating Hank

[@efusco]

Ketones are typically considered an energy source of last resort for the human body because of more complex biochemical pathway and lower ATP production than for carbs, fat & even proteins, so what’s the theory that exogenous ketones would somehow be preferentially utilized before carbs?

[@Patrnga]

You can search for Phinney&Volek on googlescholar; theyve had studies with athletes on ketogenic diets and made them ride TT efforts and did muscle biopsies. Result was that fat adapted athletes utilized much more fat on high intensities compared to non-adapted. Hence the theory as far as i know(not specifically that study). Its been somewhat a hobby of mine reading published articles on keto science though im quite unconvinced it has any relevance for the average cyclist. Plus, apart from a handful ultra-endurance runners theres no pro athlete doing such stuff.

[@seahog32]

They are not used preferably. They are just a concurrent source of energy to glucose. If present in blood stream, whether exogenous or endogenous, they get used. That covers part of body energy expenditures, hence saves some glycogen (and protein and fat) that would be burned otherwise. Also, the exogenous ketones are absorbed from the bowel using different pathways than the glucose. With the limited amount of glucose that one can absorb before the system gets overwhelmed, mixing ketones with glucose (and fructose) allows for higher energy intake from food per chosen unit of time.

[@dwebb1935]

@@Patrnga Ooh. Re: endurance athletes, I want to know what Mark Beaumont thinks of this!!

[@dwebb1935]

@@seahog32 Thanks, informative! That dual absorption pathway brings to mind the interview Emma Pooley once did with a race nutritionist, about the two nutrient transporter aspect in gut absorption: kzbin.info/www/bejne/aJuyioGBiaqjmqs Btw, may I know, on a cellular level, what is the physiological reason that a person, who drinks ketones, and who is used to fasting or the keto diet over a long-term, responds better in terms of ability to produce increased physical effort, as compared to a person who drinks the same amount of ketones but isn't fat adapted?

[@JerryHilts]

Love your vids, especially when y'all are in "GCN Does Science" mode, but I don't get this one. You do a great job of explaining the benefits ketones provide: providing an alternate fuel during long low intensity efforts, preserving precious glycogen for harder efforts. Then you devise a "test" that is essentially smashing it up a hard effort that almost certainly relied primarily on supra-threshold power. What the heck? Wouldn't it have been a better test if you had ridden for a couple hours on the flats first at an endurance pace, then gone all out up AdZ?

[@GreySpyder]

Extremely well explained. Bravo

[@ianwynneuk]

$89!! Interesting until we heard the price. Wow 😉

[@Jayneflakes]

Hmmmm, science. High energy nutrition for the mind. Another great Oli video, thank you GCN..

[@iknowyourider0]

Seriously I love it when Ollie gets his nerd on. The science is SUCH a nice complement to the sport

[@lukecooper1993]

Hello GCN I love all your videos and wish you all good health in this time of madness

[@jamieb2865]

Awesome vid, laughed so hard! As someone who does intermittent fasting I could appreciate being able to get the physical and mental clarity without the hunger.

[@julen2380]

Hmm, I understand that your test followed this journal article but, as you also mention yourself, recently Ketones seem to be thought not an instant performance booster but rather as support in "ticking over" efficiently, in recovery. There was quite an interesting article in Pro Cycling a while back where they also mentioned that for grand tour riders it might also help with having an appetit and thus simply being able to eat enough.

[@nfkb0]

yes it's Peter Hespel work

[@andersun16]

I know it's not a full-blown, clinical analysis - but it is real-world for most of us.. Thanks!

[@BiffBruise]

Glad to hear "grandma's pants" make a comeback 😉

[@Hardlinesangling]

Having a type one diabetic daughter seeing 4.0mmol keytones in the blood scares me. Great effort as always guys.

[@frompong6682]

ketoacidosis has nothing to do with normal ketosis: During ketosis, your ketone levels in the blood reach a concentration of 1-6 mM. With ketoacidosis, the blood values ​​reach a concentration of 16-30 mM. This overacidifies the blood - a life-threatening condition. Classic ketosis is not dangerous and can easily be maintained for several months to years. Source: schnelleinfachgesund.de/exogene-ketone/#Ketose_und_Keto-Azidose_8211_Der_Unterschied

[@Hardlinesangling]

@@frompong6682 thanks for that was just saying it worried me although I know it's safe in people without diabetes.

[@cosneven9884]

"all the molecules in ketones are also naturally made by the body" so are steroids 🤔

[@orbifold4387]

Or EPO.

[@finnmurden490]

And testosterone

[@natanbrastap7752]

But Ketones are food-like and not hormone-like

[@DreamsOfLegend]

@@natanbrastap7752 ABSOLUTELY correct. But they do have "hormone LIKE" properties, like protein sparring effects. It's a pretty interesting molecule

[@cosneven9884]

@@DreamsOfLegend I don't really know much about them but aren't they (ketones) solely produced when certain hormones like insuline aren't being produced by the body?

[@NielsSHansen]

How about trying to do Keto for a month and test it out in the context of a diet, although then it should be comparing the diets on a 3-4 hour route, not just 45 minutes. Ketones excells in endurance. Meaning you are likely to perform better on a keto diet in a 4 hour race, without a foodbag in the middle of the race than on a carb diet with a foodbag halfway.

[@Prof.SchulzeSternberg]

Niels, ist ja nicht so schlimm, dass Dein Englisch nicht so gut ist, deswegen auf Deutsch: was möchtest Du eigentlich sagen? Bzw. vorschlagen?

[@LukaCordedda]

That's the funniest thing I've seen all day

[@KimHojbergJensen]

@@Prof.SchulzeSternberg Are you sure he is German? Name sounds Danish or Norwegian to me.

[@Prof.SchulzeSternberg]

@@KimHojbergJensen Hi Kim, I cannot be 100% sure ;-) My 1st name is Niels too, and I am German ;-) but you're oof course right, Niels originates from Denmark I think, while Nils is Swedish, right? Maybe he will let us know :-)

[@NielsSHansen]

@@Prof.SchulzeSternberg Hmm, ok, I am kind of curious, are you saying my English is bad? I admit "excels" should only have been spelled with only one "L". Exactly how do you feel my English fails, be specific? My German will be much worse as I am Danish and I will definitely be leaning hard on Google Translate to write anything in German. If you have a preference, then I can offer any answer in English or Danish (at equal capacity), much less so in German (I was never good in German).

[@swites]

I remember an important yearly race I do every year. Anyway this one year I thought I'd bike to the startline instead of driving for once. It was a hilly hour away by bike from my house and ~560m of climbing to get there. I thought if I went slow I'd just be burning fat so no worries.lol The race started great the 1st hill was fantastic as I was well warmed up. The 2nd Cat 2 started great going along at 18kph in the bunch. Half way up the bonk hit after 1hr40 of very intense racing and I was suddenly down to 12kph(~200W max) and struggled to the finish 40 hilly k's away with nearly the whole field passing me. Terrible! Usually I bonk at the 2hr30 mark which is ok as many other are too so you don't lose too many places. Anyway this was a hard lesson on just how much carbs I burn even when I think I'm biking slowly!

[@jeffstucky6010]

Well done guys. Appreciate the combo of humor and science.

[@lucasb.3236]

Si & Lloyd sleeping got me😂😂😂

[@minimcewen]

I've used it. It is expensive and tastes like what I imagine drinking paint thinner would taste like...it is horrid...but the science makes sense. Unfortunately, the cost makes no sense.

[@scudnoski7175]

Gary Lindsey would you be interested in trying a different brand (the original in the marketplace) that I've been using for 4.5 years? Tastes great, a variety of flavors and is only ~$6 per serving. Just rode 70 mi on Saturday with just one serving completely fasted otherwise!

[@johnstoneweetabix]

i think ollie is spending more time looking after his hair than he is after that plant beside the TV.

[@dmcarthur60]

Very informative. Great video. Typically Ollie humour with great info

[@leeoien3645]

Super interesting. Thanks for putting together GCN! Hank should re-do his 24 hour Zwift ride as an additional data point!!

[@matrix3817]

Love the science, Ollie. More please. Great content!

[@JulAlxAU]

When I was in ketosis, I would go for long runs and to my absolute awe and wonder, I was fully recovered the day after! This never happens on a high carb diet. Ketosis is fantastic but it’s extremely limiting in terms of what you can eat.

[@peroperic3692]

Instead of water, bring a bottle of acetone on your next ride chaps 💪😎👍

[@Hardcaslte]

0:56 Nice Unifi WAP up there on the ceiling. Unifi: An excellent choice for all of your networking needs!

[@DreamsOfLegend]

If the workout is intense enough your body will deplete it's tank of Ketones.. I'm not a cyclist, but I'm Ketogenic and do CrossFit and that's one of the things I blood measure: I'll have a ramp up in natural production (double or triple my baseline of 1.0 mmol per liter) then TOTALLY deplete them And drop BELOW 1.0... However, I usually fast for an hour or 3 before I workout (increasing GH levels, Thomas Delauer has a great video about this!) My Ketone levels come ROCKING back and I can be even higher than my normal baseline... But remember I'm following a stringent Ketogenic diet with almost 0 carbs. I can say the mental clarity and feelings are why I love the way of life, and that one is hard to explain. ☺️👍👍

[@Fill0016]

I have bin on a keto diet for about 4 months now and I don't really see a performance increase it is about the same on and off keto. But I see a difference in how tired I get after a ride. My usual ride I about an hour, and normally I feel exhausted when I get home. On keto I feel really fresh in comparison to how I normally feel. I feel like I could do the ride again just after. And on mtb it feels better to. I don't feel depleted of energy as usual.

[@scudnoski7175]

Great Video! Exciting to see you test this and experience some of the benefits! I've been using Ketones for cycling fuel for 4.5 years and I don't pay anywhere near $30/serving ((try closer to $6))! The ketones we use are a bio-identical match to what the body produces. I can attest that this alternate fuel source consistently allows me to maintain a higher level of perceived exertion for longer without feeling fatigue, I definitely recover faster, both during rides between hard efforts (HR recovery) and also afterwards (muscle recovery). I ride fasted, fueling only with ketones (no carbs), unless I anticipate a very hard effort and then take a serving of superstarch (low glycemic carbs) and so I can dual fuel on those rides. But 95% of the time I don't include the starch because the Ketones are SO good at providing energy on demand that even hard climbs and sprints don't deplete my energy and I always finish the ride strong! Four years ago I PR'd a century ride in 4h19m after a 30 hour fast just to prove ketones really can provide what your body needs! Simply amazing stuff! The best thing is that I can honestly say i have not bonked once since using this ride fuel! It simplifies my pre-ride routine too. Just shake, drink and go! And the longer you use them, the better it gets!

[@solomontownsend]

Where are you getting your ketones?

[@coppulor6500]

​@@solomontownsendwhich ketones? Some of us are broke and leaving an affordable option would make a big difference

[@maptrx]

You should do a video on what the gains are from competition. I.e. doing the course on your own vs with someone else. Supposedly you push harder when training with others. It's a key factor in this test that you don't acknowledge Vs your previous times.

[@tebonginc]

i'v been doing keto for 3 months, so this was very much interesting for me. i was wondering what would happen if i went on a long ride

[@jaimeisreal]

One can get into ketosis without using ketone supplements. However, it does take intermittent fasting (which is not easy to do), eating very small amounts of carbs (50 grams or less per day), a high to normal level of protein, fat and water. Get a blood meter that tests ketone levels. You're officially in 'light ketosis' when your blood ketone level reaches a minimum of 0.5 mmol/L. An 'optimal ketosis' level is 1-3 mmol/L. A level of 4-6 mmol/L, is actually a bit high for optimal athletic performance.

[@Rover200Power]

Two friends of mine were involved in the testing for the Oxford University study. The things they had to do sounded brutal.

[@davomccranko]

I was wondering when GCN was gonna see how Ketamine affects cycling performance / jacking your body on the dance floor.

[@clintnieves]

Great research doc Ollie and Hank the tank

[@roobendoraisamy]

Hi Guys, this is my personal experience, i do intermittent fasting on a low card diet. I fast for 20 hrs then go for a 25 km undulating highway ride on an empty stomach. I feel good no bonking side effects. I am 70 and was doing this regularly until the lock down due to covid 19. My humble opinion is that one needs to be on a regular Ketogenic diet, generate natural ketones which becomes the primary source of energy for the body. Taking exogenous ketones while still on a high card diet will not be effective because the body has not naturally adopted to using ketones as a main source of energy it still depends on carbs for energy which is quickly exhausted. Thanks

[@jordonsmith608]

agreed

[@roobendoraisamy]

What I experience is this, when carbohydrate intake is drastically restricted the body has no alternative choice but to tap on one’s fat reserves. The result is body producing ketones and weight loss. Metabolic syndrome is also in check. Thanks

[@johncarrington8612]

It would be interesting to see to what level you could spike ketone production by diet alone.

[@schrockstar1]

Good to see you guys are still taking social distancing seriously...

[@jelleleeuwis4353]

You just became my chemistry teachers. Thanks!🤙

[@glenn7095]

Great video Ollie, I've been very curious about ketones but never enough to actually buy them. I can't say I'm surprised based on anecdotal experience from acquaintances who are on keto diets. A science of cycling show with Ollie wold be great.

[@ccamire]

Great video and thanks for sharing the results. However not sure if ketones can be used as efficiently by carbs addicts compared to fat adapted. The energy transfer cannot be so automatic. I have increased my FTP by >30% by becoming fat adapted. Usually carb energy needs to be deleted first before jumping to fat, but your body needs to be trained for that. The hybrid example was good but not sure, the energy can be transferred that easily.

[@kwacker45]

What on earth is fat adapted then

[@Lalaland2910]

​@@kwacker45 Eat low carbs, use the fat you eat as fuel. After a few weeks, months, your body adapts to using fat as fuel instead of carbs.Took me a couple of months the first time to get back to the same power levels on the bike as when I was on carbs but then I could essentially do a century without carbs and with little food without problems.

[@ccamire]

@@kwacker45 Eating very low carbs (

[@tmbmtl]

Which is worst tasting, Ketone Ester or Malort? That's a vid I'd love to see. Kudos GCN, great stuff.

[@joris818]

I recently did a 00:49:07 up Alpe de Zwift and I tought I was on top of the world :-D good effort guys !!!

[@BioStuff415]

the advantages - depending on which you use, will help preserve glycogen, dampen muscle stress, perhaps increase endurance, but in a stage race, this could be a big difference. moreover, regular use can have anabolic effects and reduction in fat %

[@ellenorbjornsdottir1166]

0.1 mmol/L (your starting level) means that you are not broken by your carbohydrate consumption - 0.0 would mean you may or may not be broken, and 0.5 or higher means you're engaging in a ketogenic diet. I must admit I've never checked my ketone level.

[@noahbrown2310]

*Was watching your videos and then notification drop*

[@doozlamuller7887]

Hi, What did your whoop say on both occasions before the climbs? Might have a bearing.

[@moses5407]

This was interesting but IMHO would have been MUCH more useful if there had been a longer approach ride at a moderate intensity level, then the climb, and with ketone levels before AND after. Just because you have a circulating level of ketones consistent with naturally induced ketosis, which involves carb depletion, doesn't necessarily mean those ketones will be used much if local carb stores are available. Interestingly, the mood elevation MAY have been due to a carb-sparing shift of the brain's ... and possibly the heart's ... use of ketones as a more primary fuel.

[@OllieBridgewood]

Jim Moses I agree. However, owing to the current situation I wasn’t able to do everything I would have liked.

[@Rustee42]

I'm not competitive, but due to being type 2 diabetic and needing to avoid carbohydrates like poison, I've been on an ultra low ketogenic diet for over 2 years. My cycling performance long distance (I do bike tours) is now better, as my body is fat adapted and I have over 10,000 calories worth of visceral and subcutaneous fat to feed off if I need to.

[@9034833838]

so its not EPO level good? What good is it for an amateur then?

[@ifodaniell]

Why would it ever be banned? It's considered another macronutrient and is marketed NOT as a supplement, but as food.

[@1958vintage]

Thanks, Oli and Hank. Great presentation, very honest, but I don't think the ketone manufacturers will be calling any time soon to get you to advertise for them! Shame, you'll just have to keep making videos on GCN for us!

[@Mr1337mf]

Is this a reupload? Feels like I have watched it or something very similar before. Deja vu

[@nildex34]

I think it's an extension of a previous video, with the experiment added.

[@troycollett8540]

Pinnen no this is a new video but the clip explaining them was part of a show last year

[@albr4]

seems like another sponsored video

[@troycollett8540]

Alan Braaa well it’s not

[@albr4]

@@troycollett8540 it's hard to tell because 90% of their videos has sponsored products in them - I wouldn't be surprised if they were sent them for free by HVMAN

[@kevin._.farren]

Wish you would include weight and w/kg.

[@cedricauguste9859]

I would love to see when coronavirus will be gone. The biggest gcn challenge ever with for example Ollie,Simon and James they could do something like a tour of europe or reproduce the tour de france. I think this would be epic. And with Gcn filming quality this video will certainly have a lots of vues. So guys maybe worth thinking about it.

[@johnratcliffe6438]

What is the brand of liquid ketones and where can they be bought in the UK please?

[@416to212]

Ollie is awesome but I don’t think Hank is fully recovered from his 24 hour effort. What’s the results of his Whoop strap?

[@nfkb0]

yes ! it would have been great to ass whoop datas as well to evaluate readiness the morning of the virtual climb

[@johnnste1]

This is the first time I’ve heard someone talk about putting the hammer down while talking about a Toyota Prius.

[@ryantaylor841]

So wat happens when u drink 2 bottles of it. Would it be better for u. Or would not be well

[@rjsulzbach]

Looks like your houseplant in the background could use some keytones itself Ollie 😬

[@deepmuscletherapyhealth6776]

just natual foods, no chemicals. there should be a competition where the athlets can take what ever drugs the want! i believ that would be very interesting . very interesting video i loved it! you are also very fit and well practiced cyclist. cheers.

[@LarsRR]

I really need those ketones. They have now both beaten my PB.

[@ygtcbee23]

Ollie besting Hank, Proof Ketones work!

[@olamarvin]

Re: "naturally produced by the body". Same can be said about growth hormones, EPO, testosterone...

[@singlespeedchronicles7640]

Duh

[@petef15]

But ketones are not hormones. They're the equivalent of taking a lot of fructose before a ride.

[@olamarvin]

@@petef15 Just saying that "naturally produced by the body" isn't a guarantee that something won't be classed as doping at some point. Blood is produced naturally (it isn't hormones either), and yet blood doping is definitely out.

[@AlexeyOsodoev]

​@@olamarvin ketosis and glycolysis are both normal metabolic states of human body. classifying ketone supplements as doping would not make any sense, or high glucose energy gels/bars/drinks should be classified as doping too.

[@mrfailure93]

Respect for saying magazine instead of clip.

[@leongebser4512]

Really interesting and informative video!

[@KetoneAid]

It matters HOW you take the ketone esters. You didn't follow the "Dual Fuel" protocol from the paper you site. Simply drinking ketones instead of carbs, won't likely do much. It is when you take BOTH that you see the gains.

[@yardleylfc]

So when you go into your time trial you won’t be using Ketones as its anaerobic carb powered mostly

[@wtfiswiththosehandles]

Love the new look, uh, D'Artagnan. *chuckle*