The Optimal Vitamin B12 Dosage for Adults

Why the current Recommended Daily Allowance for vitamin B12 may be insufficient, and what the optimal dosage is.
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This is the second in a 5-video series on B12. Stay tuned for:
• Healthiest Food Sources of Vitamin B12 (nutritionfacts.org/video/healt...)
• The Optimal Vitamin B12 Dosage for Kids, Pregnancy, and Seniors (nutritionfacts.org/video/the-o...)
• The Best Type of Vitamin B12: Cyanocobalamin or Methylcobalamin? (nutritionfacts.org/video/the-b...)
If you missed the first video, check out The Symptoms of Vitamin B21 Deficiency (nutritionfacts.org/video/the-s....
You can find all of these videos in a digital download here (drgreger.org/collections/down..., along with two additional videos that will be coming out in a few months.
My new recommendations are updated on my Optimum Nutrition Recommendations (nutritionfacts.org/2011/09/12...) page.
Have a question about this video? Leave it in the comment section at nutritionfacts.org/video/the-o... and someone on the NutritionFacts.org team will try to answer it.
Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at nutritionfacts.org/video/the-.... You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics.
If you’d rather watch these videos on KZbin, subscribe to my KZbin Channel here: kzbin.info_...
Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM
Captions for this video are available in several languages; you can find yours in the video settings. View important information about our translated resources: nutritionfacts.org/translatio...
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[@NutritionFactsOrg]

My new recommendations are updated on my Optimum Nutrition Recommendations page: nutritionfacts.org/2011/09/12/dr-gregers-2011-optimum-nutrition-recommendations/

[@maremacd]

My multivitamin has 4.8 mcg, which according to the label is 200% of the RDA. Taking 50 mcg would give you more than 2000% of the RDA. Why would the RDA be so low?

[@TommyPusztai]

@@adamgreen911 "Everyone" :) has always recommended an increased dose when taken less frequently. The body can absorb less from tha weekly dose, I mean with less efficiency. You are possibly best off with a timed-release variant anyway.

[@m0nke13]

Algae supplements are to expensive for me and my omega 6 levels are too high to convert ala. Is there other any other way except lowering my omega 6?

[@Miriam_N.]

@@adamgreen911 It's a typo. It should be 250 mcg per day (if taking every day, you can take a little bit less than 2000 per week). Dr. Greger, please fix the information on your page!

[@Miriam_N.]

I wonder why you have correct information (250 mcg) on your screenshot at 4:40, but still a typo on the real site via link (50 mcg)...

[@Sunshine74444]

5:29 He gives the answer here. You’re welcome.

[@autoltu1113]

What a great resource - not only identified recommendations but also updates them after new studies come out. Keep it up Dr. Greger!

[@tea_earl-grey-hot]

Bootlicker.

[@geneark6267]

My Chiropractor introduced me to this channel... I cannot thank him enough. This is a fantastic source of unbiased information, thank you!!!

[@syedarmaghanhassan4652]

Thanks for sharing. Finally someone, speaking properly, and quoting information properly, and titling the video right, and answering the main question .

[@raffaeln.9512]

I love how you are a true scientist and a doctor. Using most recent and legit scientific literacy, research, and data to UPDATE the recommend dose instead of clinging stubbornly to old scientific data like so many other doctors. Mad respect to you sir!

[@JDuke-uw3fk]

The new flowing water sound at the end of your videos makes me have to pee. But that makes me hydrate more, so thank you Dr Greger!

[@war1857765]

Thank you Dr Greger! I only didn't understand the daily intake necessary deppending in one previous defficiency

[@bettybenmel4944]

Thank you. Just what I needed this morning🙏

[@powernoodle1224]

What Mr. Greger does not explain is that small daily doses of B12 are much better absorbed than a weekly large dose. Google the study at 5:08. This is why a daily dose of 50 mcg is as effective as a singly weekly dose of 2000 mcg. The numbers did not add up, and this is why.

[@TheDogPa]

Because YT is where you find actual facts...LOL. You are absolutely correct...but my opinion, as someone not on the payroll of big pharma and vitamin companies, you should ignore...

[@revanthganesh3808]

Yes.. In large doses your body wont absorb that much.. But thats understood.. And though its not mentioned it doesnt make a differnce since the doses he prescribed are good enough!

[@alpinewonders]

contributions like this make it worth scrolling the comments section, so thank you!

[@jayalberts]

Excellent! Thanks! Been taking the 2500 mcg per week supplement.

[@JokerLurver]

Awesome! I've been taking 100mcg (just about) daily, so I'm glad that this confirms that that's about right. 😄

[@topraman519]

Thank you so much. This was super clear and understandable.

[@roshni_saxena]

Thank you Dr. Greger!

[@urban9361]

Thank you. I am having a question though. One of your earlier statements concerning those of us over 65 needing to take extra B12, how does the new recommendation fit in for us long term vegans over 65??

[@gabrielrey9951]

Gracias doctor., por sus recomendaciones para tomar vitaminas B12 su video esta muy bien detallado. Porfabor recomiendeme algo para fortalecer mi cerebro no estoy reteniendo información en mi cerebro . Gracias. Saludos desde tijuana b.c México DIOS LE BENDIGA .

[@nathaliedrinkstea]

Very informative! Thank you for all your hard work

[@carmensanchezgarcia4280]

Gracias por los subtítulos en español. Saludos desde México

[@kirren29]

Thank you, I’ve just found your channel 🎉🎉🎉

[@jeanneamato8278]

You are so helpful. Thanks.

[@amyplatt9190]

I have been taking 1000mcg cyanocobalamin per day!

[@Manullus]

Please make a video to once and for all clear up the debate between Methyl- and Cyanocobalamin.

[@maremacd]

So many commenting that they alternate between the two. What is the benefit of that I wonder?

[@empath3133]

Just watch a video of dr beef explaining the different and he said methyl is better because the other one has small doses of a toxin

[@KrystalessR]

take Methyl

[@EricScott-qh5dg]

The actor Dick York that played the original husband of Samantha in the TV show "Bewitched". When Dick York started his vitamin B12 treatment, he had a severe reaction to maybe Cyanocobalamin? He was Hospitalized for 6 weeks and was replaced by another actor. Was told that Methylcobalamin is better because it's natural but Cyanocobalamin is cheaper to manufacture.

[@KryptonixX]

Hydroxyl was designed to solves it all

[@phatvegan1691]

Thank you Dr Greger and Team! Hay Y'all, hit that LIKE Button 👍

[@johncookson2494]

Thanks for the Video - Very Informative

[@vascoamaralgrilo]

Great insight, thanks!

[@andredemers69]

Thank you for this lecture. I am 62 YO and bought some Vit B12 because I have internal tremor and I hear that it could help. I got the 5000mcg doses but on the container they say 1 tablet per day...it's far from the max 2000mcg per week. I intend to take it only 1 month to see if it helps, then stop if no changes. Am I getting too much? Is it dangerous for my health? Thank you for your answer. Dominique

[@holly7515]

I’m confused. I keep hearing that adults should get around 2.4 mcg’s of b12 but when I shop around for b12, I am only seeing 1000 mcg. Why are the stores selling such high dosages

[@ashishrajput8124]

I read an article which stated that according to Harvard maximum of 1000 MCG body can easily take but to be on safer side 500mcg will do as we get b12 from our diet as well. When you buy a multivitamin there wil be only 2.4 MCG the recommended dosage but isolating b12 only and selling it of 2.4 MCG will be very cheap and company will not make any profit so they sell higher dosage which is safe and they can make profit ou if it.

[@robertdobie2544]

It’s important to remember that B12 is water soluble (the same way vitamin C is) - which means that if you ingest more than you need your body will naturally excrete it in urine. When I had my blood tested, my B12 was “a little low” (because I had sometimes forgotten to take a daily supplement). Later, my blood test was fine because I’ve since upped the dosage to what I know is more than the minimum requirement. Just to make sure. Any extra gets peed out without a toxic level accumulating.

[@ddpwe5269]

Not true at all, look up the fact you can get acne from over-consuming.

[@robertdobie2544]

@@ddpwe5269 Interesting. Thanks.

[@ddpwe5269]

@@robertdobie2544 yeah, I learned the hard way and was wondering why I would be breakout seeing I've never had a problem since my early 20s lol

[@ddpwe5269]

@B G He just released videos on it. It certainly can cause acne if you over do it.

[@ddpwe5269]

@SoUL Not sure why I didn't see your reply 2 months ago, but I just reduced the amount I used. Depending on the pills I get, either 2 x 1k or 1 x 2.5k per week.

[@aquie4d999]

Great video! Great Information, thank you

[@tamcon72]

You're going to need to do a follow-up video on this follow-up video, based on warranted confusion in the comments!

[@zainabal-bty2718]

what's the difference between the old and the new Bragg's nutritional yeast container? they have changed the percentage values

[@KaylaPatrickmusic]

You should talk about methylcobalamin with adenosylcobalamin.

[@Wawruto]

PLEASE HELP ME! My supplements have 2.4 mcg of B12 and it says it represents 100% of our needs. Can you help me understand? How on Earth could I reach 50mcg? I don't understand anything... Thank you so much

[@iCristalrose]

Wawruto 2.4 mcg dose is enough to cover your daily need of 1 mcg (this is what you will absorb out of 2.4). But in case you need to lower your homocysteine level you need to take more. At the same time absorption % gets lower the more you take. So to absorb slightly more than 1 mcg you will need to take not less than 10-50 mcg daily, or even better 250 mcg to absorb ~3.5 mcg.

[@rickmaneiro93]

​@@Wawruto You need to find another supplement with higher dosage. Simple. I take 500 mcg every other day.

[@deannaalegria5125]

Would you recommend more for a diabetic taking Metformin? I have read that metformin can reduce the amount of b12 that is absorbed.

[@MotherfuckingDesiree]

Thank you

[@sthubbar]

Thank you.

[@LuisMartinez-nn1bv]

Hi, a little confused about the correlation between the 2000mcg weekly vs the 50mcg daily; and from 50mcg daily to 1000mcg daily for the 65+ buddies... Thanks...

[@HanneArts]

Is this true for supplements as well as fortified foods? Plant milks, for example, only have about 0.38 mcg per 100 ml, which is far from the recommended 50 mcg daily. Thanks for the video!

[@ginalombardi4293]

Thank you for this very valuable info!

[@helicart]

Optimal dosage if you don't have gut issues. If you suffer with any gut disorder or weight reduction surgery, your ability to absorb B12 via intrinsic factor route and/or passive diffusion is likely compromised. Further, if you have a fatty liver or compromised bile duct, utilization of liver B12 stores will be seriously compromised.

[@InaElly]

Thank God I saw this!!! I hadn’t yet, but was thinking the 2000mcg dose was an every day does. Holy Crap! Thank you!!!!

[@mamajudah7269]

Sir you were talking about a bit fast for me, I-m looking for Mg measuremets,or MCG measurement that on my B12 liquid drops at 5000. I'm confused.

[@kengrew2616]

This video is three years old. Has any anything changed since then? When and how is it best to take the supplement of B12?

[@foodguy3435]

Great stuff!

[@edrabogucki401]

Always great! I’m taking 1000 mcg sublingual daily by prescription, for several years.

[@edrabogucki401]

@@deb_is_here1425 Not any more, well into my thirties. Chronic anemia until monthly B12 shots prescribed, then replaced by the tablets.

[@edrabogucki401]

@SoUL No. I’m now in my 70’s, had acne from early teens to mid-30’s.

[@edrabogucki401]

@SoUL Have you seen your doctor?

[@revanthganesh3808]

@@edrabogucki401 how long you been taking vitamin b12 tablets... And why do you take those high doses daily, even in the video its said 2000mcg once weekly is enough!

[@bibikhan1080]

October bliss.Happy birthday. Viva Dr Greger.

[@eelkeaptroot1393]

I take about 500 every other day, so I should be fine...Thanks for the info, doc!

[@alittlegreenjean]

should i delay brushing my teeth after using a sublingual b12 supplement? thanks.

[@SleepMeditationMoon]

Taking Cyanocobalamin daily, 2500 mcg, feeling less tired, dizzy, & weak. We are Healthy & Strong Vegans. 🥗🥦

[@StephyGrowsWeed]

B12 levels above 900/1000 are considered to speed up grow of (lung)-cancer especially in males. It doesn’t cause cancer but can (under specific circumstances) speed up growth of already mutated cells. 2500mcg over a long period, i would get my B12 levels checked. 50mcg per day are Greggers recommendations. Why take 50x more?

[@aaroiseverything]

Hi doctor greger! do athletes need more b12?

[@VFella]

Dosages of methylcobalamine (usually oral microtabs) range between 10000 and 1000 µg and almost all meat substitutes and plant based milks do include B12 (cyanocobalamin) this should be well covered for everybody (as long as she takes her supplements).

[@jocelynedubuc3977]

What does a homocysteine level of minus -3.00 mean if normal reading is supposed to be 0.10 to 13.00?

[@EricScott-qh5dg]

Read somewhere that Alcoholics have pronounced problems with absorption of vitamin B12, because of the liver's involvement in the absorption of vitamin B12. The actor Dick York, who played the husband of Samantha in the TV show: Bewitched, lost his job because when he (Dick York), started his Cobalamin treatment had severe reaction to maybe the Cyanocobalamin? He was Hospitalized for 6 weeks and was replaced by another actor.

[@roksolana7475]

Thank you, Dr . Greger! Could you please recommend how often I should have B12 injections and what dosage? I cannot find good quality B12 supplements. Thank you in advance.

[@StephyGrowsWeed]

100mcg of either cyanocobalamin or hydroxocobalamin (this one has a depot effect) per month. Get ur levels checked yearly and don’t take a shot before checking ur levels.

[@roksolana7475]

@@StephyGrowsWeed thank you for your response!!!

[@revanthganesh3808]

@@roksolana7475 i guess 100mcg may not be enough.. You need one 1000mcg injection per month specially if you're takibg cyanocobalamine.. But with hydroxocobalamine you can take one 1000mcg injection once a month.. So kindly consult your doc and make a informed decision

[@t0sh]

Can you do the same for DHA and EPA omega-3 fats, meaning considering the conversion rate is it enough to eat certain amount of flax/chia/etc. or to get enough DHA can be done via supplementation only?

[@contact2001]

I hope you still get this, search for „ dr Michael Klaper omega 3 update“ it’s only a few weeks old

[@musicofnote1]

Of course, if you have been taking Metformin for years AND have neuropathy, the literature has shown dosages of up to 5mg/day. Which is EXACTLY where I am. After suffering from neuropathy since 1999, I started a regime of neurotropic B vitamins (B1, B6 P5P, B7, B9 and B12) and 90% of my pain I've suffered with for decades, disappeared in the first week. In the course of the next 6 months, the numbness in my thighs receded to the tops of my ankles with parts of my feet also regaining sensation. As a test, I will start very, very gradually reducing these to see where the symptoms startup again, thus transitioning from the initial load dosage to a longer term maintenance dosage. At the moment I'm takin 1.5mg B12 before each meal as part of this therapeutic dosage I will reduce this initially to 3mg spread out over four times a day.

[@PetrilloCinema]

Okay here's my question cause I'm a little confused about the calculations. Can I do 1000mcg twice a week as someone under 50? Seems like it should work.

[@butzmn7190]

Is it healthier to sit down to eat or to eat while standing?

[@ByrdNick]

The units are confusing me. Sometimes the recommendation is referred to in single digits and other times it is in thousands. Which is it?

[@nibblrrr7124]

You should either take 50µg cyanocobalamin B12 once a day, or 2,000µg once a week. The RDA/DV is just 2,4µg, but that doesn't take into account that the body can only absorb a little at a time efficiently. That doesn't matter as much if you get it spread out over the day in the form of animal products or fortified foods, but matters a lot if you just want to take it all at once. Your body can only absorb the first µg or so through a specialized transport mechanism ("intrinsic factor"). The rest has to passively diffuse through the intestine walls (or the skin under your tongue with sublingual tablets), which is much less efficient and the vast majority doesn't make it. But you can compensate by taking a lot more, so the body gets the couple µg it has used up during the day. Once it's in the body, it can store even larger amounts very efficiently in the liver, so once a week is a good strategy, esp. since B12 itself is dirt cheap and you mostly pay for the filler & packaging of the tablets.

[@nibblrrr7124]

Oh, and these masses are given in units of *micrograms* (µg, sometimes mcg or ug), which is one millionth of a gram - as opposed to the usual milligrams (mg) used for other nutrients, because we need so little B12. 1,000µg = 1mg = 0.001g

[@Tikutae]

so about the 2000 mcg per week, does that mean the 2000 mcg must be taken all at once or can I instead take a 1000 mcg tablet TWICE a week instead?

[@AndrewPawley11]

I love this channel!

[@marionwinnett1347]

Does anyone know where to get a vitamin b12 supplement with a low enough dose for a young child?

[@James-zr1lu]

So in the last two studies presented, the first one says 7ug absorbed is optimum, yet in the second one 50 ug/day (supplement) (which doesn't equal 7ug absorbed) is only needed. Why value the last study over the first?

[@nibblrrr7124]

Not sure which study you mean by "first" - can you give a timestamp/title/author? If you're talking about the formula (Berlin et al 1968, at 4:32), it is just a model of B12 absorption, extrapolated from different data using theoretical considerations & assumptions. The last study (Del Bo et al 2019, at 5:07) was an empirical test in real humans, which showed that those exact doses achieve the actual outcome that we care about (low homocysteine & MMA levels, as well as serum B12 levels), so it makes sense to prioritize that.

[@rhondamiles2099]

After 2 1/2 years on a WFPB diet, my husband finally had his B12 checked and it was 148. We both had been taking 1000 mcg 3x per week sublingual...methylcobalamin. He went to daily same dose and it came up to 290. He is now taking 2000 mcg per day alternating methyl and cyanocobalamin. He is due to be checked again in about a month. I believe all vegans should test and not assume you are taking enough. Supplement accordingly until you reach a safe if not optimum level.

[@dimitardimitrov1358]

I completely agree, B12 levels should be tested yearly. I took 1000mcg methyl 3 times per week too, for a year. Now I'm nearly deficient - 290 pg/ml.

[@adiohead]

B12 blood levels aren't reliable, a urine MMA test is far more reliable to check for B12 deficiency.

[@ddpwe5269]

Are you SURE?! That's WELL outside the bell curve range for recommended. I take 1k(alternating between Myth and Cob) once per week and drink a cup of almond milk/day that is fortified and my b12 is perfect. Which is well within the curve.

[@rhondamiles2099]

adiohead I will tell my husband to ask for that test. Thank you.

[@rhondamiles2099]

DDPWE Odd question....yes I’m sure...

[@kimdavis5631]

Genius!

[@bonniethornton]

Is a time-released or non-time-released B12 supplement recommended? Or does it not matter which?

[@johnAsanz]

At 5:28 it reads take the supplement on an empty stomach though on my supplement tablets bottle it says take with food! Which is best???

[@JAC82]

I am curious: will chewing a pill work to mix my saliva with the b12?

[@hhancp]

50mcg daily or 2000mcg weekly for sublingual? How about capsules?

[@Mrtom40]

Whats the best one to buy

[@navpalsingh6377]

what is a good b12 supplement?

[@kim8dk]

Love the content. Only thing i'm missing is since i'm an athlete I wonder if I require more than the general population of some of the things listed in the videos. There is never any mention of that.

[@WoWzX9]

Eat some liver, you'll be 200% more healthy :)

[@WoWzX9]

@SoUL That exact comment makes you a monster :)

[@WoWzX9]

@SoUL Get some choline, it's good for mood disorders. :)

[@WoWzX9]

@SoUL Regardless of you as a person, it's a fact that vegans can be extremely cruel to anyone that doesn't align with their dogma :) It is a fact that animal organs are the most nutritious foods on the planet, and no wonder all indigenous cultures treasured them above all. I come here and tell the guy with b12 deficiency to eat liver because it has enormous amounts of BIOAVAILABLE b12, instead of supplementing and you call me a monster, is there anything more to comment?

[@contact2001]

@SoUL Well that is only true if that human is not deficient. ;-). But the fact is that those meat eaters know that they are wrong and that they only supplementing the B12 and the protein through the poor animals. As animals don't produce it themselves but only eat it or get it supplemented if they are not out in the wild. As soy and corn only contains proteins, carbs, fats and micronutrients but unfortunately it does not contain B12.

[@jamieobryan7036]

I know this video was a year ago but I am still confused with the math of all this with the mcg and the percentage and daily value. I desperately need to know if what im wanting to take is ok. Is it ok to take a Bcomplex & blood builder everyday? The b complex has b12 of 50mcg as methylcobalamin & the blood builder has b12 of 30mcg of cyanocobalamin. Is 80mcg of this ok? I am taking just the blood builder at the moment, for a week now but I want to take the Bcomplex everyday too. Im just worried ill be getting too much. I got blood work done and it wasn't too bad. I got it done because I wasn't feeling myself and having depression like symptoms and panic attacks. I was anemic in the past also. I just had a miscarriage two months ago and bled for 15 days. So I feel my iron wasn't where it should be due to this. My RDW% was on the higher level of 14.3 which I looked up it says your iron could be low. So it wasn't horrible but now where it should be. So thats why I started the blood builder. I got these vitamins from MegaFood Vitamins because they are made from food and seemed much better than over the counter stuff. Please help me to know if this is what I should be taking.

[@sudhanshudesai]

What is a correct dose of B12 for kids between 7-15?

[@moshet842]

I have been taking 2500mcg per day lol

[@tropicluva43]

Why is b12 cyanocobalimum strongly recommended when it has cyanide in the ingredients.

[@martinextejt3453]

Even this video has me confused. I'm a 62 yo Male vegan. I was taking 1,000 mcg 1 daily in a supplement. When I reduced to 2,000 mcg weekly I was very fatigued and went back to 1,000 mcg daily. Problem solved. Additional study shows you can take too much B-12 and the excess isn't simply eliminated. Yup, every now and again I'll have fortified nutritional yeast as a flavoring and I love a Miramite sandwich. What's a boy to do?

[@Eric-uz9tu]

In his reccomendations he says people over 65 should take 1,000 mcg daily

[@SlwRpr]

Thanks for info over 65 years old. Only have small size iphone and some videos have very small print. 😊

[@simmiedavissimmiesings8185]

I really needed this info. Thanks

[@WoWzX9]

Can you make a video covering the new study showing a ketogenic diet can reverse heart disease?

[@IceBoNeZ]

It can't, the study is flawed.

[@brandondye8280]

So if I take 1000 twice a week that should be fine I assume?

[@justinhale5693]

Slow down! Vitamins B12, choline, and folate can partly accommodate a deficiency of each other right? They all address elevated homocysteine for instance. So taking more B12 could mask a folate or choline deficiency right?

[@vahkurama]

Please make a video about chlorella and b12, thank you :)

[@vahkurama]

@@deb_is_here1425 it's just that I have been taking chlorella for 3 or 4 years now and my b12 levels are fine. I've done my own research about it and I feel that taking chlorella is a better way to get b12 cuz it's considered a super food. Im curious why hardly any of the vegan dr's talk about chlorella and b12, they always recommend b12 supplements when chlorella is superior.

[@vahkurama]

@SoUL its green algae.

[@vahkurama]

@@deb_is_here1425 I take tablets atm, but when I can't find the tablets I take powder. I try to buy organic Taiwanese chlorella because it has the lowest amount of heavy metals, and chlorella pyrenoidosa is supposedly better than chlorella vulgaris.

[@itsaplantlife9850]

How sufficient is spirulina in B12 absorption? I have MTHFR issues for folic acid so I avoid most supplemented foods.

[@350vic]

Dr Greger recommends to not use spirulina for several reasons. As far as b12 is concerned it seems to actually block absorption. kzbin.info/www/bejne/pZubonStnKZ3mq8

[@nikhilnegi9446]

In my country Cyanocobalamin is not available. My b12 test shows the level less than 159pg/mL. What should be my dosage (of Methylcobalamin) and for what duration?

[@NutritionFactsOrg]

Hi, Nikhil Negi! 2,000 mcg/day chewable or sublingual for two months may work. You may be interested in this video, if you haven't already seen it: nutritionfacts.org/video/the-best-type-of-vitamin-b12-cyanocobalamin-or-methylcobalamin/ I hope that helps! -Christine Kestner, MS, CNS, LDN, NutritionFacts.org Health Support Volunteer

[@lilo4235]

My brother I sent him vitamin b12 he's not had b12 before and has chest pain how much international units daily b12 prevents b12 deficiency and numbness

[@oldsculgamer5815]

Is 1000 mcg vitamin b12 tablet daily safe?

[@kindcounselor]

What about people over 70? I currently take 1000 much daily as per your recommendation:I'm 73 and vegan.

[@KayFlowidity]

2:10 🙌👌

[@jacobusbaker9285]

Dr Esselstyn takes a 1000 mcg a day. And this guy is sharp for his age!

[@davidjones8164]

What the hell is a micrograms IU vs mg. How doe we know when shopping?

[@stuarthall2523]

Another excellent video. Thank you. 👍

[@tobinspired]

What B12 supplement brands are y'all using?

[@nayanmanjunath2406]

I use NatureMade Cyano 1000mcg twice a week

[@reddnebbula]

My doctor prescribed 1000 mcg daily for me. Is that very bad b12 deficiency and what kind of b12 is that? The ones from the pharmacy.

[@sweetwilly125]

ok is that for people over 50??? i didn't catch that part????

[@Wawruto]

PLEASE HELP ME! My supplements have 2.4 mcg of B12 and it says it represents 100% of our needs. Can you help me understand? How on Earth could I reach 50mcg? I don't understand anything... Thank you so much

[@mohamedrafiq869]

Take a high dose supplement ? There's 500ug to 1000ug supplements

[@nibblrrr7124]

Yes, buy a different supplement with a higher dose. The official DV for B12 is 2.4µg (mcg) because that amount would probably be sufficient if you were to get it spread out over the day in the form of animal products or multiple fortified foods - but if you're taking it all at once in a tablet, your body can't absorb it as well, so you need to compensate by taking more. The actual B12 in those tablets is dirt cheap, the vast majority of the production cost of those tablets is filler material & packaging.

[@humblecourageous3919]

I'm a little confused. I have one supplement that says 1000 mcg that I take occasionally. Another daily multi says 15 mg. It SAYS the 15 mg is 882%. Is that correct? Is it enough? The 1000 mcg says it is almost 17,000%.

[@revanthganesh3808]

Like he said.. If your takin daily 50mcg is enough.. If weekly you need 2000mcg!

[@84Chadd]

Haha I was taking about 1250mcg a day. The suggested serving was actually 2500mcg per day. I guess I can cut back a little. I thought I could just rely on fortified milk but it doesn't seem it was cutting it. I was getting brain fog and had low energy. Felt like passing out. I'm not sure if it was related though.

[@giovannabarbosa9878]

Is there a problem to supplement 250mcg a day? Is It dangerous?

[@Iruth27]

I generally take a pill of 500 micrograms once every two days. Would it be better instead to just take 4 pills once each week in that case?

[@contact2001]

no 500 every other day is better

[@TheNightRida]

Can someone explain why the recommended frequency always seems to be either daily or once weekly? Is that just random or does it matter in terms of absorption? Like is 1000 mcg twice a week just as fine?

[@gregoryshawn100]

The once a week option is an easy to remember alternative for those who find the daily supplementation inconvenient, but of course you can take B12 twice or three times a week or whenever you want. As for the dosage, 1000mcg twice a week is actually more than 2000mcg once a week because of the complex absorption mechanism (the lower the dose the higher the absorption) but since b12 has no toxicity or adverse effects, 1000mcg twice a week is perfectly fine.

[@TommyPusztai]

I am sure it is more than adequate. Though not an expert... I tried to do the same same pattern but kept forgetting. :) Easier to take it daily, together with the hormone:) D.

[@TheNightRida]

@@gregoryshawn100 Okay the reason I’m asking, is because the b12 that I have is in liquid form and one tincture-full, which goes up to 1 ml, is 500 mcg B12, so it’s impossible to measure 50 mcg if I were to take it daily, cause the tincture is so tiny, and then taking 4 full tinctures once a week just seemed like a lot to me. I’ve heard of a study linking excess b12 to increase risk of lung cancer in men. Haven’t read into it more, but it was enough to make me go “okay I want to hit the recommended amount and not a single mcg more”, that’s why I’m trying to be so precise about it 😂

[@TheNightRida]

@@TommyPusztai Yea remembering it can be a problem sometimes! It’s all about finding a way to make it a habit 👍

[@contact2001]

@@TheNightRida Well get tested, as long as you are within normal range you do not need to worry about cancer. Aim for above 400 to below 900

[@Bushcraft242]

Can I use b-complex