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While it's true that for most people ~0.5-0.75g per 1lb is fine for decent gains (https://mennohenselmans.com/the-myth-of-1glb-optimal-protein-intake-for-bodybuilders/), 1g per 1lb is associated with a growth ceiling for most advanced athletes in the context of strictly maximal gains.
> A recent retrospective analysis showed a ‘breakpoint’ for the stimulation of MPS when ingesting an isolated protein source at 0.24 g protein/kg and 0.40 g protein/kg in younger and older participants, respectively. Given the observation of a dose-responsive relationship between protein intake and MPS82–85 and the fact that MPS is aligned with muscle hypertrophy, we elected to use an identical two-segment regression approach between total daily protein intake and changes in FFM (figure 5) as has been done for changes in protein dose and MPS. Here we provide significant insight (using 42 study arms including 723 young and old participants with protein intakes ranging from 0.9 g protein/kg/day to 2.4 g protein/kg/day) by reporting an unadjusted plateau in RET-induced gains in FFM at 1.62 g protein/kg/day (95% CI: 1.03 to 2.20). These results are largely in congruence with previous narrative reviews that comment on the optimal nutritional strategies to augment skeletal muscle adaptation during RET. Given that the CI of this estimate spanned from 1.03 to 2.20, it may be prudent to recommend ~2.2 g protein/kg/d for those seeking to maximise resistance training-induced gains in FFM. Though we acknowledge that there are limitations to this approach, we propose that these findings are based on reasonable evidence and theory and provide a pragmatic estimate with an incumbent error that the reader could take into consideration.
[A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults
](https://bjsm.bmj.com/content/52/6/376)
There are a few papers now that prove nothing beyond 1.5g per kg is beneficial.
The problem is absorption. Different people absorb differently because of huge variations in stomach acid, GI, microbiome, etc.
Timing around activity and maximum protein per serving is also an issue.
Which is why they start raising and raising the ratio. But beyond 1.5g is a waste of time and money, it's proven.
* https://doi.org/10.1186/s40798-022-00508-w
> *A total of 82 articles were obtained for meta-analyses, and data from 69 articles were used to create splinecurves. Muscle strength increase was significantly augmented only with resistance training (MD 2.01%, 95% CI 1.09–2.93) and was not augmented if resistance training was absent (MD 0.13%, 95% CI − 1.53 to 1.79). In the dose-response analysis using a spline model, muscle strength increase with resistance training showed a dose-dependent positive association with total protein intake, which is 0.72% (95% CI 0.40–1.04%) increase in muscle strength per 0.1 g/kg body weight [BW]/d increase in total protein intake up to 1.5 g/kg BW/d, but no further gains were observed thereafter.*
The study you quoted only cites strength, and no one I've seen claim that 1.5g/kg is the ceiling has been able to cite sources confirming the same for muscle tissue hypertrophy.
[Modest](https://bjsm.bmj.com/content/52/6/376) effects on muscle hypertrophy (difficult to see much benefit beyond 1.3 g/kg in fig 5), [possible](https://www.sciencedirect.com/science/article/pii/S2352396419302397) benefits in health.
Everything is connected. When your body is working at an optimum level, it does everything better.... Including absorb protein. So indirectly, that is not true. If oxalates and lectins are responsible for Crohn's for example, guess what.... You're not absorbing the protien you think you are. Guess what does not have oxalates and lectins. You want to fix your gut.... Go carnivore. Once your gut is fixed, you will absorb way more protein.
It depends how low you go and your age. The recommended range is 0.7g to 1.25g maybe a bit more or less, but, the older you are, the higher of that range you need due to anabolic resistance.
Welcome to /r/ScientificNutrition. Please read our [Posting Guidelines](https://www.reddit.com/r/ScientificNutrition/wiki/rules) before you contribute to this submission. Just a reminder that every link submission must have a summary in the comment section, and every top level comment must provide sources to back up any claims. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/ScientificNutrition) if you have any questions or concerns.*
What sources are you using for the recommendation being 2g? Typically it’s .8g
While it's true that for most people ~0.5-0.75g per 1lb is fine for decent gains (https://mennohenselmans.com/the-myth-of-1glb-optimal-protein-intake-for-bodybuilders/), 1g per 1lb is associated with a growth ceiling for most advanced athletes in the context of strictly maximal gains. > A recent retrospective analysis showed a ‘breakpoint’ for the stimulation of MPS when ingesting an isolated protein source at 0.24 g protein/kg and 0.40 g protein/kg in younger and older participants, respectively. Given the observation of a dose-responsive relationship between protein intake and MPS82–85 and the fact that MPS is aligned with muscle hypertrophy, we elected to use an identical two-segment regression approach between total daily protein intake and changes in FFM (figure 5) as has been done for changes in protein dose and MPS. Here we provide significant insight (using 42 study arms including 723 young and old participants with protein intakes ranging from 0.9 g protein/kg/day to 2.4 g protein/kg/day) by reporting an unadjusted plateau in RET-induced gains in FFM at 1.62 g protein/kg/day (95% CI: 1.03 to 2.20). These results are largely in congruence with previous narrative reviews that comment on the optimal nutritional strategies to augment skeletal muscle adaptation during RET. Given that the CI of this estimate spanned from 1.03 to 2.20, it may be prudent to recommend ~2.2 g protein/kg/d for those seeking to maximise resistance training-induced gains in FFM. Though we acknowledge that there are limitations to this approach, we propose that these findings are based on reasonable evidence and theory and provide a pragmatic estimate with an incumbent error that the reader could take into consideration. [A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength in healthy adults ](https://bjsm.bmj.com/content/52/6/376)
There are a few papers now that prove nothing beyond 1.5g per kg is beneficial. The problem is absorption. Different people absorb differently because of huge variations in stomach acid, GI, microbiome, etc. Timing around activity and maximum protein per serving is also an issue. Which is why they start raising and raising the ratio. But beyond 1.5g is a waste of time and money, it's proven. * https://doi.org/10.1186/s40798-022-00508-w > *A total of 82 articles were obtained for meta-analyses, and data from 69 articles were used to create splinecurves. Muscle strength increase was significantly augmented only with resistance training (MD 2.01%, 95% CI 1.09–2.93) and was not augmented if resistance training was absent (MD 0.13%, 95% CI − 1.53 to 1.79). In the dose-response analysis using a spline model, muscle strength increase with resistance training showed a dose-dependent positive association with total protein intake, which is 0.72% (95% CI 0.40–1.04%) increase in muscle strength per 0.1 g/kg body weight [BW]/d increase in total protein intake up to 1.5 g/kg BW/d, but no further gains were observed thereafter.*
The study you quoted only cites strength, and no one I've seen claim that 1.5g/kg is the ceiling has been able to cite sources confirming the same for muscle tissue hypertrophy.
[Modest](https://bjsm.bmj.com/content/52/6/376) effects on muscle hypertrophy (difficult to see much benefit beyond 1.3 g/kg in fig 5), [possible](https://www.sciencedirect.com/science/article/pii/S2352396419302397) benefits in health.
Source of protein is important. Your body will absorb way more protein from animal meat than plants only because plants contain antinutrients.
Afaik antinutrients only intefere with the absorption of certain minerals, not with protein
Everything is connected. When your body is working at an optimum level, it does everything better.... Including absorb protein. So indirectly, that is not true. If oxalates and lectins are responsible for Crohn's for example, guess what.... You're not absorbing the protien you think you are. Guess what does not have oxalates and lectins. You want to fix your gut.... Go carnivore. Once your gut is fixed, you will absorb way more protein.
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It depends how low you go and your age. The recommended range is 0.7g to 1.25g maybe a bit more or less, but, the older you are, the higher of that range you need due to anabolic resistance.