Food Theory: I Tried the "Burn What You Eat" Diet

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Have you ever wondered how hard it is to truly burn off EVERYTHING we eat? Whether you are looking to lose weight, gain weight, or maintain it, keeping track of your nutrition can be quite the battle. In today’s episode, we will be testing out how challenging it is to burn off every single calorie we eat in our multi-day experiment!
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Credits:
Writers: Santi Massa
Editors: Jerika (NekoOnigiri), Axellent, Millie Ferris, Koen Verhagen, Tyler Mascola
Sound Designer: Yosi Berman
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#Nutrition #NutritionTips #FitnessTips #FitnessJourney #Wellness #HealthyLifestyle #HealthyLiving #HealthyEating #HealthandWellness #Theory #FoodTheory

[@marquiseh5128]

Inter-channel beefing is the best addition of the "new" hosts

[@unnamedracer9757]

I want to see a cooking show show up with unclear lore so that we can get Santi V Lee so bad 😂 Ideally, with an element that involves choosing the optimal clothing for the competition to get Amy in on it. And finally, a video game spin off of it to get Tom in. That’s the wild crossover I want.

[@gfdx3214]

Agreed

[@ItisJasmine27]

Agreed

[@stuffingtonjfluffypantsiii]

crossovers are so much more fun when it's not the same person hosting all the channels

[@cryptidsystem890]

@@unnamedracer9757I need this

[@StevenHe]

12:28 I will now play this clip on repeat in the gym.

[@tanush6599]

First also love ur vids

[@iulistef22]

hello

[@NuggetBoy1227]

Try not to emotionally damage yourself

[@spectral282mcoc]

Love your fishbowl series

[@Catsandlegolover7461]

HA HA HA HAHHAHAHAGAGQH

[@jeremymitchem327]

"Check my lore." Is a shockingly threatening statement.

[@Officialnutterbutter]

The Doctor legit did this XD

[@eleanorbrubacker7282]

Food theory idea: caffeine and ADHD, why does it effect neurodivergent people differently that neurotypicals ? and what substances or chemicals have the effect on neurodivergent people in the way that caffeine effects neurotypical people?

[@josalyngreer131]

That a good theory idea for all ADHD people to learn

[@eleanorbrubacker7282]

Especially because I LOVE coffee, but I can’t drink it too much because it makes me sleepy sometimes

[@ZaberZlayer7]

I’d love to see them do this!!! It would be such an interesting episode to watch h, especially since I’m part of that group of Neurodivergent.

[@lily8122]

Yeah, I have adhd and I feel like coffee effects me quite normally, although I also feel like I never need it since I just rarely get tired despite not sleeping enough. Anyway the adhd people who do get that weird coffee response fascinate me.

[@joannjames7985]

I don't get sleepy unless I have a lot of caffeine, but it definitely doesn't keep me awake. I also have an addiction tho, if I stop drinking it, I get migraines

[@mozax8118]

Food Theory idea 💡: In Scooby-Doo, can you Theorize Shaggy's metabolism and calculate his maximum calorie count as well as answer the question if Shaggy could have diabetes?

[@AceJackal253]

He uses that energy to go Ultra Instinct

[@blessingbear92account35]

or what scooby snacks are made of

[@just-another-lunatic]

@@blessingbear92account35 YES! We deserve the truth behind the greatest mystery of them all!

[@imboredig]

​@blessingbear92account35 right!? Because Scooby-Doo snacks is like a super boost for those two but at the same time it's dog food? Like it has things that only dogs can eat so idk

[@bethanyandcloe3589]

I like the idea but why diabetes

[@bloodmooncomics2249]

"I heard that" "Well I said it loud" Man, the theory siblings are really at it.

[@tashinatorgaming9674]

The sibling-esque quibble of 3 of the four hosts is so cute and relatable! Really adds charm and character to these videos! A shame Lee isn't as involved in the beef. Well, maybe a little with Tom but not as much as this.

[@tyukogames]

Lee is the middle child

[@SilverGamingFI]

the 3 are ADHD and Lee is in the other room watching cartoons

[@tashinatorgaming9674]

@ I woulda considered him the elder bro since he's much more calm and mature (as in not playing into this beef / rivalry bit)

[@althealee9375]

Love to imagine Tom, Santi and Amy squabbling in the background while Lee is happily watching TV or a movie and taking notes

[@DKTH77]

This is how i envision it, Tom and Santi are always at each other throats, Amy trys to keep the peace but will throw shade at Santi and defend Tom, Lee is just kicked back watching with a bag of popcorn while Ash records the other 3

[@gibberishname]

BRO adding water to your oatmeal will not add ANY calories, and helps with digestion

[@sauvagess]

the digestion part was the point. Less digestion means less calories absorbed.

[@mashed821]

@@sauvagess yeah but he always eats it dry

[@gibberishname]

@@sauvagess not necessarily. Cooking the oats will increase their volume making you FEEL fuller by increasing the volume. A cup of uncooked oats has WAY MORE calories than a cup of cooked oats because of that change in volume.Also cooking increases the bioavailabilty (how easy your body absorbs) vitamins and minerals like iron and zinc.

[@sauvagess]

@@gibberishname This isn't about satiety, nor nutrition, this is about numbers.

[@gibberishname]

@@sauvagess says who? also, satiety affects the numbers. You can eat fewer calories of food that satiates you more and not get hangry like they did in the video.

[@ZuriSimpson-x6o]

2:22 poor tom. he’s like the british orphan in all of those old timey movies

[@khapat1479]

SO TRUE, and as a fellow brit I feel bad for him

[@bluburycore]

"please sir, can I please have some lore?" XD

[@bukenator0788]

@@bluburycore fire reference 10/10

[@WarCpa]

This seemed like it ended abruptly

[@squip7]

Yeah they didnt actually show them trying to burn the food off. I wonder if this is a editing mistake

[@ZackSeifMusic]

I feel like half the video is missing

[@parkersmith-mccombs2479]

@ZackSeifMusic spiffing brit reference?

[@gabbonoo]

@@ZackSeifMusic probably because the details would be boring for their target

[@Shg567yy]

I cannot believe Santi eats his oatmeal dry💀💀💀

[@SMH-ACADEMY3]

He will not be judged

[@timothymoss4945]

As a reliable source said ‘Santi Sucks’, that’s probably how he moistens it. Yes, I did enjoy using the word moisten in a KZbin comment!

[@l4dy0c3]

@SMH-ACADEMY3 Does not negate that we don't understand HOW he does this, like I need an explanation because maybe I can start doing that, too, question mark. What's terrible is that I'm just picturing him eating dry oats as a horse would - with the lil thing over his face - while scrolling through emails at the table, lol. I should learn how to draw. '>__>

[@CompoundBoy]

@@l4dy0c3 as a person who eats oats daily, it is possible, if you really like oats. I had a friend, who said, that he had a dad, who ate dry oats with a glass of milk on the side. I like the taste of oats, and I can eat them dry, but not fast and not in great amounts (I suppose that would help cut down on the Calories.)

[@foxythetroll644]

I can't believe people eat oatmeal in 2025 that's a meal for George Washington

[@girattle_7716]

I love the “buen Provecho” At the end. As a Puerto Rican, it made me glad to hear it

[@extrovertedintrovert2900]

My Venezuelan auntie always says it, so it was a sweet reminder of her

[@andrea29523]

it was a pleasant surprise!!

[@Elizabeth_BLux]

Cómo mexicana igual me hace feliz escucharlo

[@rayediance]

❤

[@maikel3915]

Siii! Me sonó tan bonito. También cuando dice nombres (de marcas o comidas) en Español por lo general lo pronuncia bien y me encanta

[@maironamakesstuff]

I adore these crossovers! Santi and Amy are so fun together. Really, all the channel directors give sibling energy toward each other in the best possible way 😆💜

[@nafspark]

Struggling to understand how what they did was connected to the central thesis of the episode.

[@rel124c41a]

Same here. This video was a mess.

[@Tim.Stotelmeyer]

There was no real conclusion included in the video. It was like they recorded what they did for 3 days then decided to not include the conclusion in the finished video.

[@nightowl3891]

So glad I saw your comment. I thought I had brain damage or something because even after rewatching it I had no idea what they were trying to do

[@ciel6347]

How difficult is it to eat what you burn? 3-day trial. Day 1 eat at 500kcal deficit. Day 2 eat what you burn. Day 3 eat 500kcal excess. Final result: Not hard at all. It wasn't really a theory. I wish they did a theory to explore if the idea of ectomorph, mesomorph, and endomorph body types hold any water and how to determine what your type is.

[@harrisontaylor779]

It's an awkward one anyway. Most current research already shows exercise doesn't impact daily calorie use. So really there's only changing the amount you eat to discuss

[@alwaysmindit9198]

This isn't really about 'burn what you eat' - it's more about eating a day under calories, a day at calories, and a day above a calories. Video title should probably be renamed

[@ponko-curioso]

I’m honestly super confused about what the challenge was at all…?

[@MichaelxVoorhees]

you dont understand how clickbait and views work do you?

[@mtd322]

This was one of the worst video they've put out yet

[@nightowl3891]

Yeah, after day one they didn't really meantion what they did for exercise

[@brotherofAnubus]

Santi eating oatmeal DRY is much more wild than anything else in this video.

[@DreadPathZone]

Eating oatmeal dry must be a crime of some sort

[@AustynSN]

I'd consider it some sort of penance. Which begs the question of what horrific crimes God, nature and humanity Santi has committed.

[@jensenkerr664]

Don't dry oats also expand in your stomach or haves my life been a lie

[@helloworldd7151]

less than 3 minutes in santi's already throwing shots at tom

[@stuffie5175]

12:59 Was that Spanish?

[@quiquex4942]

Si

[@calvinthurston1441]

French

[@nutschannel2.072]

He's from Argentina, so

[@the.rizzler4996]

I thought it was minion

[@jesusromanpadro3853]

Yes, it is a bit hard to translate, but "buen provecho" is something like "enjoy your meal."

[@abbieplate1785]

I have to ask, WHY didn’t you wait till after the holidays to do this experiment? It seems like something that can be done at any time so was there just something else going on that placed those three days during this time?

[@lunayen]

Scheduling conflicts?

[@cheyenne1188]

They had a sponsor which means they were in contract

[@abbieplate1785]

@@cheyenne1188 Oh okay, thank you. : )

[@jonathanthegreat2008]

Santi's crash on Dr. Mike Varshavski is comically comical! New ship?

[@verdeverde2763]

Peewoop

[@Zenoc_gamer]

I would love if they one day do a collab on some theory together, it would be cool

[@516MoonLight]

​@@Zenoc_gamer OMG YEAH!

[@Bertziethegreat]

"Eating in a surplus is hard." Can't relate.

[@evanjaynewman9343]

Right? Me over here thinking, "I can throw back 3,000 calories daily NO PROBLEM" 😂

[@Username0467]

When eating healthy foods it is.

[@Bertziethegreat]

@@Username0467 Not if you know what you're doing.

[@thepadfoot1]

7:46. Lore you say?

[@adrian_xyz3093]

Fnaf Lore?

[@Iterus_The_Game_Breaker]

LOOOOOOORRRRRRRRRRREEEEEEEEEEEEEEE

[@zacharisincennes8026]

You should do a Food Theory episode that determines the most effective cure for garlic breath.

[@TheKNIGHTELFMOHAWK]

And onion breath

[@cejuonline]

Brush your teeth?

[@marquiseh5128]

Also to consider is the kinda of calories you eat, how long it takes to break down Eating the same calorie content of protein vs sugar would have wildly different results Also oh God another direct to door meal service

[@King_EnderBrine]

A 100-200 calorie deficit or excess, is what you should strive for. This range is the most reasonable for the average person to maintain.

[@aaronm3258]

At a 100 calorie deficit it would take you 35 days to lose 1lb. Even if you are only trying to lose 10lbs that deficit would make it take nearly a year. 500 is the general recommended for 1lb a week, which is definitely sustainable.

[@TheNightMan250]

Sonic 3 and a new Food Theory episode. Peak cinema after peak cinema

[@silinicityYT]

fr

[@KittyCatThang]

The hosts are just siblings with the most intense rivalry. I love this.

[@CynicalReprobate]

6:16 Athletic Amy makes me feel things i never thought i could

[@HardinNoneyourbusiness]

What

[@AyySorento]

The best thing I did was follow a few super simple rules. You don't need a specific diet, you just need a bit of control. Eat the food you love with self-control. 1. Only eat when you are truly hungry. Hungry enough to eat a full meal. If you are hungry, your body is burning calories. So, hold off a bit but not too long or that can lead to over eating. I personally only eat 2 meals a day because of this but others do need three. 2. No snacking. Only full meals. If you HAVE to snack, keep it 100 calories or less and sugar free. 3. Drink more water. Your body doesn't know the difference between hungry and thirsty. If you feel hungry, drink some water first. When you wake up in the morning, instead of eating, drink water. If you are still hungry 30-60 minutes later, then follow rule 1.

[@asym1i376]

Underrated comment. This is actually great advice

[@KinHallen]

My strategy is to skip the next meal after snacking

[@alphamuskrat499]

Bro I want and longer version of this. There's so much interesting science here i feel like this episode could have been 30 minutes

[@pricelarva]

Santi is þe perfect replacement for MatPat. You are þe only one who can match his energy and determination. Keep going! (Also yes I do use þe þorn)

[@Squares2]

The fact that we are still talking about MatPat in 2025 shows how much we miss him and want him to come back.

[@WyattRodebaugh]

Þorn my beloved (never forget ð either tho)

[@wilhelmbuzzkyll]

@Squares2 It’s only been a year, it’s not like the internet will forget he existed.

[@pricelarva]

​@WyattRodebaugh True, we will miss þe þorn and þe eþ for þeir conventional comebacks shan't exist 😢

[@AdrianJohnson-w5g]

nice þanks (I don't know wæï I said þanks)

[@ktoon4725]

Amy’s lore is something we need covered 🤣

[@Demo_tf7]

The eating disorder episode of food theory

[@nagitokomaeda7417]

lol that’s what I was thinking

[@jillian5915]

yeah… they should’ve put more thought into this

[@leemackie3113]

Literally. This is soo unhealthy to be posting it’s insane

[@jancymadueno8947]

I’ll just say that I’ve been on a calorie-deficit diet for the past 8 months… when you get used to it you love the way you feel, and I’ve lost 63 pounds!!!

[@modell1084]

Santi has the saltiest shots taken at his fellow hosts. If an energy you couldn’t see with just matpat.

[@elibethqueen476]

I laughed so much with this episode! I love the dynamic between hosts it just cracks me up

[@Pomni3477]

1:27 That is a good thing to include. Vegetarian diet.

I love how they’re like the best friend siblings, Lee is the middle child, and Tom’s the crazy one 😂

[@dorathy7787]

4:00 and u know what else is massive? ur channel

[@baaconrat]

1:03 "hOwW 🤖 hard is it to burn what we eat" U DID NOT JUST TRY TO SLIP THAT BY ME

[@TypicalGamer_0001]

I think that when people first start dieting it is hard at first. I can say that from experience since it was hard for me to adjust right away, but afterwards it became easier and easier for me to have a more of a healthier diet. Also, you don’t have to do clean eating or count the amount of calories you ate since, it’ll cause too much pressure. As an advise to anyone who is wanting to lose calories, just control how much you eat on a daily basis if you are in need of burning off some calories and hit the gym is you like to burn even more calories. I will say it is easy for some but for others it is harder than expected so I’d advise to just focus more primarily on trying your best rather than forcing yourself to lose all the calories right away. As usual, stay amazing everyone, and strive for greatness!

[@nandreiandrei2618]

First step is always the hardest so indeed go slow

[@TypicalGamer_0001]

@ So true! There is a lot of things that can happen to make a diet more hard to achieve. I agree with you that taking it slow is the best option. 👍

[@SecraBreton]

I can relate. When you are pregnant you have to add 500 calories and nursing adds another 300 calories. I was both pregnant and nursing and had to take in 1300 calories more a day than before I got pregnant. Only time in my life I hated food.

[@JGamer415]

As a theorist watcher from all the way back in the normal boot days, and who slowly drifted away sometime between film and food theory, I'm glad to say I enjoy the new content and will be coming back for more now that I've got the time and interest again.

[@faithmoreno1142]

Oh my gosh 😂 this might be the best banter on FT! “Well I said it loud!” And “Check my lore!” Have me rolling 😂

[@ChupacabraFun]

I love how Santi and Amy are acting like the two youngest siblings its so funny

[@ParkerShaffer-x2l]

Food theory idea it’s like the theory of how long you can survive in a supermarket but how long can you survive in a gas station?

[@kekfont]

Im just convinced that amy and santi are long lost siblings at this point, their bickering is SUCH sibling behaviour

[@NTDang]

You guys "just grabbing" towards the easy calories shows that you didnt really plan anything and just winged this experiment

[@greason]

as someone who only watches the occasional video on any of the channels, I always end up watching santi most

[@anoopkashyap401]

Santi and Amy fighting like siblings is really too wholesome ♥

[@Andy-e1v8d]

Santi stop making enemies, first it was Tom now it’s Amy, is Lee next?

[@Wakaplayer12]

Santi is burning more bridges than calories😂

[@Gaberillo]

Food theory idea: how long can you survive on candy?

[@AidenWolf97]

Love the "buen provecho" at the end of the episodes!

[@Itsem22]

I’m loving these collabs!!

[@akirayamaguchithekitsune4010]

This look interested that I did this as science project in high school

[@Akirayamabuchithekitsune]

Cool dude

[@Joshpods]

Dude did just reply with your second account

[@Fabio-Jose-DragonKing]

WORK IT SANTI 🔥🔥🔥🔥🔥

[@danielstokes2127]

Food Theory/ Game Theory crossover: how to maximize the number of tickets you can get at Chuck E. Cheese, Dave and Busters and other food and game restaurants!

[@aff77141]

amy and santi give suuuuuuuuch sibling energy 😂😂😂

[@Solopetelo-ev5kw]

Wait im a little confused so they would have to eat that specific amount of calories and then burn it off by working out? And if they wanted to eat more they would have to work out more right? So on day one they needed to work out all those calories, day 2 eat normally, and day 3 now match the upper calories by eating. Is this correct?

[@lunayen]

Yes.

[@nightowl3891]

I'm so confused what they were trying to do and especially what was the theory about it

[@nightowl3891]

I'm so confused what they were trying to do and especially what was the theory about it

[@DKTH77]

I love how the new host feel like a family, it makes these videos so funny

[@olivialane2736]

Food Theory Idea: Calculating the different meal prep/meal kit prices (Hello Fresh, Blue Apron, X Factor, Cook x Unity, etc) and comparing it to grocery shopping

[@LunaWitcherArt]

I like how the hosts feel like siblings and Ash feels like the cousin that stays over from time to time

[@sansundertale20-15]

Nvm the guy pouring grease all over his stove 5:03

[@Spirit_Toonz]

How dare KZbin hide this from me for 5 minutes

[@محمدوسيممحمد-ب6ي]

Watching them constantly insult eachother is really funny tbh

[@Macks645]

I thought they were going to burn everything they ate to a crisp.

[@PushpaRaji-oh2bf]

i kept hearing about Vibrations of Manifestation by alex lane from my friends, and honestly, i thought it was just another trendy self-help book. but when they started landing jobs they thought were impossible and reconnecting with things they’re passionate about, i had to pay attention. it’s not just “be positive” stuff; it’s more about aligning with what you actually want in life. if you’re stuck or feeling off, maybe it’s the nudge you need-it’s worked for people around me.

[@bethanyandcloe3589]

12:20 Amy sounds a little bit like my aunt not with what she’s saying but her voice literally sounds like my aunt’s voice

[@Santiago-gm1hx]

Sheesh, listening Santi said "Buen Provecho" was so nice haha, he should said that everytime he ends a video! Great video, and hola tocayo!

[@waywardhunter0532]

I love the direction Santi (hope I'm spelling it right) is taking the channel! I've noticed how genuinely excited I am when a new Food Theory is up, and how much I've been learning ^u^ Also, thank you especially for this episode's research, it can be easy to over simplify things but you got it down!!

[@21aanyamathur44]

i LOVE the crossovers its like when a cartoon character appears in another cartoon

[@AndreiBostina-h4w]

The channel lore goes crazy, now Santi only has Lee to go before he has beaf with EVERYONE.

[@froppytheweeb7556]

The (hangry jack the ripper bit) absolutely had me cracking up 😂

[@edwardtdm123]

It's amazing how much effort goes into understanding personal nutrition-props to Santi and Amy for this! 👏🏽

[@abigailmaturana741]

i love the sibling rivalry between these two 😂💖

[@Batminem0]

These crossovers are just the best

[@EnKayAre]

Thumbnail was misleading, expected Santi to be reppin two plates with pinch grip no arch

[@KayKayLaLa.]

When I read the title without seeing the thumbnail I thought “I’m reeeeeally good at burning food, but I thought eating burnt food isn’t healthy.” 😂

[@lime822]

Omfg, i havnt watched the theory channels in ages, and let me say sante, you doing great

[@DBushika]

LOVE collaborative episodes with Amy. Frenemies = engagement!

[@Atquicktie]

Great video but consider boosting audio in quieter clips next time, some clips were really quiet compared to others

[@MikeyGardner1524]

53% Evil in my Opinion to know from 👌😅👍 8:34

[@kevincronk7981]

I eat dry oatmeal fairly often, but that is only because I don't want to spend the time or effort to make it right. That stuff is barely edible dry, its only purpose is to technically supply my body with calories. So actually perfect for this episode!

[@MichelleAcosta-h7k]

11:37 he said jack the freakin ripper 👍

[@ninjabryen]

rivalry goes crazy like a war in this vid

[@tsubasasupremo]

you did this on the Holidays, Santi you're a Grinch!

[@LadyLeomon]

So today we’re finding out if ‘burning calories’ is real? I really hope so 😅😅😅 Thanks for the tasty new Theory, Santi and *please* go hug your furbabies all 💙🐱💙

[@ACROTER]

INTRODUCING THE FIRST COMMENT!

[@LadyLeomon]

@@ACROTERwait, seriously?! Post-MatPat but I’ll take it! Thanks 😂😂😂

[@NOMSENSE1]

Recommend:30 seconds ago Video:10 minutes ago

[@juanpablofajardoramirez1008]

WHOA WHOA WHOA lol got "reset" with Santi speaking in Spanish at the end ahhaha

[@MelbourneTyler]

10:30 A quick and easy snack I made when I would go to the gym Is peanut butter toast. The peanut butter gave me proteins, calories, and some sugar the bread the type didn't matter it's used as more of an energy boost. I saw it as a protein bar replacement

[@SwitchSstrike]

The VO: sibling quarrels Live action: just insults Between Santi and Amy

[@Arob4343]

As someone who eats “less than optimal foods” often. 3k is suuuuper easy 😅

[@BabbiiJesus]

Love your friendship with Amy. Nice banter

[@Wingmansato1996]

Love this brother and sister vibe between Santi and Amy

[@emeraldqueen1994]

If you want a LOW calorie snack, here’s what you need 1) countertop ice maker 2) water filter 3) filtered tap water Select a size of ice cube that fits in ONE CHEEK with your 👅 and is small / soft enough to not hurt your teeth while still giving you a satisfying crunch

[@parasol9792]

Today I realized food theory is modern day Mythbusters and I love It so much

[@Peejay5895]

10:05 Her calorie level is OVER 9000

[@theceilidhinthemists]

This sounds like an eating disorder speedrun