Join 50,000+ readers learning how to use AI in just 5 minutes daily.
Completely free, unsubscribe at any time.
Summary
In this engaging discussion, the host delves into recent research that potentially challenges long-held beliefs about protein intake for muscle growth. Contrary to past recommendations, new findings suggest higher protein consumption may yield better muscle gains. While previous guidelines, based on a 2018 study, capped optimal protein intake at 1.6 grams per kilogram of bodyweight, a 2022 meta-analysis proposes that higher intakes could still be beneficial. Despite the recent study being less cited, it offers compelling evidence for re-evaluating protein intake parameters for lifters and non-lifters alike.
Highlights
A recent study challenges the 1.6 grams/kg protein recommendation, suggesting benefits up to 1.3 grams/lb. π
The new analysis adjusts for factors like age and body weight, offering a comprehensive view. π§
While past research created an echo chamber, the new findings demand a shift in understanding. π’
The study uses a robust sample size of 72 studies, expanding on the previous 50-study meta-analysis. π
Awareness of these findings is limited, but they can greatly influence dietary strategies for muscle growth. π€
Key Takeaways
The 2022 study suggests higher protein intake may benefit muscle growth more than previously thought. ποΈββοΈ
Previous guidelines limited optimal protein intake to 1.6 grams per kilogram of body weight, but new research challenges this. π
Diminishing returns exist, but benefits still increase up to 1.3 grams per pound of body weight. π
There is a need to adjust protein intake recommendations, especially for older adults and plant-based diets. πΏ
Despite lesser citations, the newer research offers substantial insights for those aiming to maximize hypertrophy. π‘
Overview
In a captivating video, Renaissance Periodization uncovers groundbreaking findings that challenge the entrenched beliefs about protein intake for muscle growth. A new study, overshadowed by its well-cited predecessor, presents a fascinating twistβhigher protein consumption might indeed enhance hypertrophy more substantially than once thought. This research questions the past norms and encourages lifters to reconsider their protein intake strategies if they aim to maximize muscle gain.
The video emphasizes the details of the 2022 meta-analysis, which broadens the participant criteria to include both lifters and non-lifters, incorporating new methods for adjusting variables like age and body composition. Unlike the 2018 study, which was limited in scope, this research bases its conclusions on an impressive 72-study sample. This breadth suggests a need to potentially increase protein intake above the previous cap for optimal muscle growth.
Despite the profound implications of these findings, mainstream adoption has been slow, possibly due to the research's lesser-known status. However, for those in pursuit of maximum hypertrophy, this study offers a rich vein of insights. It challenges traditional protein intake guidelines, suggesting that up to 1.3 grams per pound of bodyweight could lead to significant gains, particularly for older individuals and those on plant-based diets, urging a re-evaluation of current dietary practices.
We Were All Wrong About Protein Intake? Transcription
00:00 - 00:30 I think the paper I'm about to discuss might broadly overturn much of what I've said you've said meno said this is getting real embarrassing can we just bury this paper stop stop stop stop [Music] recording I want to grow muscle mhm but damn it I don't know how much protein to eat and I am absolutely uninterested in anything but the latest research can you help me I can help you oh my God I'm unbelievable this is Japanese people got
00:30 - 01:00 you as well I love it World War II was just one giant misunderstanding it's been all Kawaii since then what is that mean that means uh I believe cute in Japanese or whatever a I'm dipping into my anime incel knowledge yes yes do you think that when they were bombing various American facilities the Japanese during World War II Drew emojis and uh like Hello Kitty stickers were put on the bombs yes it's crazy how Emoji culture kind of almost came from Japan
01:00 - 01:30 at one point I remember like back in the day you remember when emojis weren't really a thing yet like not the the drawings right people would make like the convoluted text based emojis faces with the colon and the yeah like the star emojis and like you know crazy hey nowadays Japan huge cultural exports you know they they made it back oh yeah anyways you might have heard and I might have said and you might have said everyone might have said that to maximize muscle building you only need to have around 1.6 G of protein per
01:30 - 02:00 kilog of body weight maybe even you're being cautious I was being cautious 1 gr of protein per pound of body weight that's like the highest people usually go outside of traditional Jim brro lore where 10 years ago 20 years ago uh companies were getting Filthy Rich by saying ah three grams per pound broke trust me that was the the day to be selling protein um I have also cited some more speculative work by uh Helms and colleagues in their review paper back in the day that in some conditions for Natural Body close to a show even as
02:00 - 02:30 much as 1.3 gram per pound of lean body mass could be an effective strategy but is very unlikely to be true and based on much of the review work done by Eman henselman for most people substantially lower than that seems to be good enough yep but in Japan they like to do Japanese things they do Japanese things and I think the paper I'm about to discuss might broadly overturn much of what
02:30 - 03:00 I've said you've said meno said this is getting real embarrassing can we just bury this paper stop stop stop recording um see people for the most part based their recommendations off of a review paper by Morton and colleagues from 2018 where that paper's now gotten 1,200 citations so it's big stuff um and it mostly has to do with one it being a metanalysis and at the time being the most comprehensive one yet M which is
03:00 - 03:30 great and also based on the sort of status of researchers involved like I think Brad shenfeld was on it a few big names were on it and then people like myself Jeff whatever everyone kind of got on it and because that was the best at the time started citing it that kind of turned into a bit of an echo chamber where people kept citing that same figure over and over again over and over again as we sometimes tend to do in the uh evidence-based Fitness Echo chamber however it turns out that four years later so in 2022 has been a more recent metanalysis
03:30 - 04:00 on the topic back in 2018 Mort and colleagues had looked at a total of around 50 studies which is a big sample in specifically lifters who reported their protein intakes in these studies so who were lifting consistently were consuming protein and where they measured lean body mass or fat fat free Mass gains that was their measurement of choice um and they effectively ran a couple of analyses at the time they looked at a linear regression where effectively just looked the data points and using software you try and draw a
04:00 - 04:30 line that will most closely fit those data points so you minimize the residuals the distance between that trend line and the individual data points what best predicts how much lean body mass people gain based on their protein intake yes making the best line um and that was a reasonable fit for the data but then the authors also went ahead and performed a basic line regression where effectively instead of saying it's one straight line it's two straight lines and you think that might
04:30 - 05:00 be a better fit they did find that analysis was a better fit they didn't do a polinomial just those two analyses okay um so their first analysis linear regression as you expect like more protein more lean body mass gained to a certain like a certain slope um however the basic regression where you draw two lines instead to kind of represent okay maybe there's diminishing returns after a certain protein intake that did that was a better fit of the data the analysis was insignificant technically even say as much in the paper but they
05:00 - 05:30 present it nevertheless because it's better fit and it's still better than just a simple line right but because of how they analyed it it effectively implied that up until 1.6 grams of protein per kilogram of body weight there is a benefit and afterwards it just flatlines sure no more benefit however that was kind of the best piece of research we had for four years but in 2022 tagawa and colleagues performed another metanalysis this time one conducting a better sort of analysis in terms of adjusting for confounders
05:30 - 06:00 and two including more research so this time they didn't just look at research in lifters but also in research in non-li and they also just included more studies overall so specifically studies in lifters who were lifting consistently over the study and reported their protein intake they got a total of I think 72 studies so next couple crap even more research so that's enough research to be like okay the findings here are going to be pretty robust yeah right um and they had a couple different models where they adjust it for
06:00 - 06:30 different confounders in their first model they adjust for no confounders second model they adjust it for things like age where the order you get the less sensitive you tend to become to protein uh sex Etc and in the third model they also then on top of that adjust it for the amount of body weight gained which is important right because if by if one group consume more protein but as a result also go into a surplus that amount of body weight gained can quickly influence not be a protein thing you know then you have to adjust for that
06:30 - 07:00 anyways so let me walk you through results one when not adjusting for body weight gained both lifters and non-li saw more hypertrophy as they consumed more protein all the way to 1.3 G per pound however in non- lifters once you then controlled for body weight gained that relationship kind of went away like P like I think 7 gram per pound if then you know gaining weight doesn't really matter right however in lifters when
07:00 - 07:30 even when adjusting for body weight gained higher protein intakes led to more growth all the way to 1.3 G per pound it was there was still an element of diminishing returns wherein the slope was kind of Greater up until around that previous figure of 1.6 grams per kilogram or8 roughly and then afterwards it kind of the slope diminished but it was still positive and in fact running some rough numbers on that regression I want to say going from like5 G per pound to around what 04 to8
07:30 - 08:00 GS per pound that gave you around three times lean body mass gains so from I think4 kilog lean body mass gained on average over the course of the study to 1.2 so triple roughly so that's like an appreciable difference right but then going from around 8 grams per pound which is the current kind of like the facto recommendation all the way to 1.3 that still boosted growth by about 40% so 40% more growth by going from the current recommendation to a much higher one is a substantial difference huge and most people even if you go from 1 G per
08:00 - 08:30 pound to 1.3 it's still an appreciable difference in growth now that paper has only gotten 80 citations why because lesser known researchers e already know this kind of stuff yep so people are like oh Mort metag regression Mor regression everyone cting the same paper over and over again it's self- perpetuating but this paper came out two years ago far fewer citations not that many people know about it in fact it was Greg Knuckles who put me on to it I hadn't even heard of it that's Greg always knows a little fucking bullshit here there yeah
08:30 - 09:00 um so yeah that's one big thing to the protein research that people aren't aware of and I think yes there are diminishing returns but people tend to think that it's a solved issue past that point like past one grand per pound the more benefit sometimes even less than that oh most people think even less than that spaceace I get clowned for saying a grand per pound people tell me that's too much and I used to say the same I used to think that but that is the strongest piece of research out there that's 70 studies now this is per pound or propound lean body mass propound
09:00 - 09:30 propound so it's more protein than people think now a couple of kind of caveat sort of limitations to paper um some of them are actually not limitations even strengths but whatever one is often times in these studies I spoke to Y trlin about this directly because I was curious about opinion um a lot of these studies tend to use food Diaries typically people will under report protein intake based on food Diaries so if anything
09:30 - 10:00 we might have a bit more research on higher protein intakes than the Met regression would have you believe just because people typically report it via food Diaries and people typically under report so in reality the numbers involved might be a bit higher still does that make sense wouldn't they be lower people also people will say they're having 100 grams but then if you actually went and looked at what they were actually having day today it might be 120 so what I mean is like in the studies reporting it might say that one group was having one gr per pound but in reality they were having 1 too so we
10:00 - 10:30 have a bit more data on higher protein intakes and you're assuming that when people try to implement these they won't under report they be depends on how you see it okay I see I see but if you're saying okay these are precise people we're talking about very evidence-based people they're going to say look these people ate 100 grams of protein I don't eat anymore and like actually they ate 120 you're like oh shit well I've been accounting for all sources right exactly got it so that's one thing the second thing is I took a look at their statistics to figure out how many of of the studies included had sufficiently
10:30 - 11:00 high protein intakes because one case you could make is that very few studies actually look at like one gram to 1.3 grams per pound and so maybe it's just like we don't have enough research there to really know right yeah it's like saying if you uh you know if you climb a tree high enough you'll eventually get to the moon but the trees aren't tall enough to infer how shit Works in space exactly um so just to make sure that I wasn't just like looking at this graph and being like well this looks very conclusive to me I actually wanted to see how much data is that tail end based right and so I looked through the
11:00 - 11:30 numbers and it looks like around 20% of the studies had a protein intake 20 25 in excess of one CR per pound oh that's solid so it's like that's if you do that times 70 studies that's 14 studies or whatever it is um so yeah there's obviously ideally we'd have even more research to forur in for where is that upper end but it's sufficient in my opinion to shift the recommendation at this stage I think think there's two
11:30 - 12:00 recommendations we can derive from this paper one just like before there are diminishing returns past a certain point I think that point some how could there not be how much physiology do you have to not know to know there's diminish and Returns on almost every measured variable ever can you imagine a line where it was like that would be wild where is that apparently with volume According to some people one set is all you need that's it um so that's one thing is there is diminishing returns which gives birth to
12:00 - 12:30 a practical recommendation for the average li who doesn't really want to care too much um and that's around 8 grams per pound you will see solid growth not your best but like solid and protein is expensive it's a pain to eat you know like oh go on are you in your Lambo right now looking down on the peasants my Lambo is actually made of protein because it makes it more expensive uh very nonfunctional um I I have time for that
12:30 - 13:00 I think it's a wise thing to say but I have to say that almost everyone I've ever spoken to in real life who complains about how protein is expensive is at the fucking club several times a week buying drinks at the club and fellas like the marginal the relative cost of protein to other macronutrients at the store High m the absolute cost of protein as far as food in your diet especially you just buy Basics and lots of protein powders
13:00 - 13:30 is nominal don't let me see that iPhone 16 in your handig homie if you're talking about protein expensive you feel me you know what I'm saying Milo like like if you're living in a developing Nation yeah hell yeah that's a thing but don't you come at me with Austria Germany Finland Sweden Japan and be like was the protein is quite expensive like shut up sure I get you if you're trying to be a mist or if you're broke it's a decent recommendation yes you know unlike Mr Lambo look I get protein fed
13:30 - 14:00 to me like people pour protein drinks into my mouth because using my own hands is such a poor people think to do it's offensive I feel it that's recommendation number one now if you're uh wealthy Jeff basos entrepreneur then you want to go for the recommendation that is likely to maximize hypertrophy and in my opinion that's somewhere between 1 to 1.3 Gams per pound we don't currently have enough Precision in our estimate in my opinion to say for sure like .3 G is going to be
14:00 - 14:30 miles better than one but I think as long as you're somewhere in that ballp of 1 to 1.3 maybe even 1.3 if you want to sort of head your bets I think you'll likely maximize your growth at that point until further research where we look at an excess of 1.3 because that's kind of where the analysis was capped who knows maybe it's 1.5 but for the time being I think if you're somewhere in the ballpark of 1 to 1.3 that is a practical level that I would say you're approximately maximizing growth very curious every time I talk to you
14:30 - 15:00 Milo I learn a ton of stuff and it's so rare for me because I'm so fucking smart I know almost everything he's got why are you laughing you son of a bitch he doesn't understand a lot of what I say he just Giggles every now and again try to fit in um this has been incredibly insightful and I suppose one question people might have is is there any research uh that tells us what fraction should be complete protein incomplete protein do you have any evidence-based opinions
15:00 - 15:30 on that or just heuristics you can use yeah so from speaking to some of the experts on the topic and from looking through research myself unless you're following a severely restricted diet usually quality of protein sources is not overly worth worrying about like especially if you're consuming 1.3 G per pound usually the quality of individual protein sources doesn't matter too much unless you're that one Widow who's only exclusively getting protein from One Source you'll be fine um if you're or a shitty Source you can
15:30 - 16:00 get it all from wey and be totally great but if you get it all from breadcrumbs or something yeah or like if you're a vegan and only ever getting one specific protein Source yes maybe not ideal right and that brings me to the final point if you are an old lifter saying excess of around 60 years old or if you are plant-based that is where adjusting your protein intake upwards even more probably makes sense by around 20% or so damn I was going to use the term plant-based but I've have told myself I'm never using that term and here's why
16:00 - 16:30 plant-based is a propaganda fiction when almost every bodybuilder eats food their diet is plant-based surprisingly yes but also like many bodybuilders don't have sufficient vegetables in their diet like it is shocking to me but they do eat lots of white rice which is a plant and that's where most their calories come from versus protein uh I use the term vegan because that's the fucking term vegans stop trying to propagandize people into plant-base nobody believes you but then how are you going to encapsulate
16:30 - 17:00 vegetarians fucking vegans and other similar populations with dietary restrictions that are on the plant-based spectrum of things almost every diet is plant-based unless you're an Inuit and you eat blood more heavily plant-based you just call them more heavily plant-based I just call them vegans bro because that's who we're talking about how many ovol lacto vegetarians do you know I know three or he's one of the three there you go maybe we don't even know if he's that anymore um no I you okay so if you're if you're
17:00 - 17:30 doing the vegan thing vegetarian thing a little bit more for insurance purposes but keep most of your protein high quality you don't need to worry about the fringes that makes total sense [Music]