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[AF] The effectiveness of protein supplements on athletic performance and postexercise

what it claims

The community is debating the actual utility of protein supplements: many suggest that their perceived benefits could simply stem from higher total caloric intake or improved satiety, rather than a specific efficacy of the product itself.

mixed

Scientific literature, particularly via meta-analyses such as the one mentioned (2025) and previous work, shows that protein intake is crucial for preserving lean mass, especially…

noli's read

Scientific literature, particularly via meta-analyses such as the one mentioned (2025) and previous work, shows that protein intake is crucial for preserving lean mass, especially during a caloric deficit. However, research often nuances the impact of powdered supplements compared to whole-food proteins (JISSN, systematic review). It is proven that if total protein intake is sufficient, the source matters little, which validates the idea that the supplement is merely a tool of convenience and not a magic metabolic 'booster' (RCT). Exaggeration often lies in the belief that a massive excess of protein (beyond standard recommendations) provides linear gains, whereas a plateau is reached quite rapidly. Numerous observational and experimental studies confirm that the satiety effect of protein is very real and aids in weight management, which may mask the actual benefit of supplements in certain poorly controlled studies. The community is generally skeptical regarding the superiority of supplements over a balanced, solid-food diet.

the sources

  1. 1Lim MT, Pan BJ, Toh DWK, Sutanto CN, Kim JE 2021
  2. 2Tagawa R, Watanabe D, Ito K, et al. 2020
  3. 3Rutherfurd SM, Fanning AC, Miller BJ, Moughan PJ 2015
  4. 4r/AdvancedFitness

Claimed by r/AdvancedFitness. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

What the graded evidence says

Evidence
B
Effect
lean mass/strength by protein source; dose-response of protein intake — animal vs plant protein produce similar gains in lean mass and strength when intake is adequate (meta-analysis); muscle-mass gains from added protein plateau near typical target intakes; dairy proteins score higher on DIAAS than most plant proteins
Measured on
adults, mostly resistance-training or older adults

What’s uncertain

Whey is a high-quality protein, but 'high quality' mainly matters if your overall protein or leucine is low; once you're eating enough, source makes little difference to muscle. Powders are convenience, not a requirement.

r/AdvancedFitness in the Register33 claims graded · solidity 66/100See their record →

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