Research paper
Morton RW, Murphy KT, McKellar SR, Schoenfeld BJ, Henselmans M, Helms E, Aragon AA, Devries MC, Banfield L, Krieger JW, Phillips SM. 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. Br J Sports Med. 2018 Mar;52(6):376-384. doi:10.1136/bjsports-2017-097608
Why we cite it
The largest and most-cited meta-analysis quantifying how total daily protein intake affects muscle and strength gains from resistance training. It establishes that dietary protein supplementation significantly augments resistance-training-induced increases in muscle mass and strength, and that benefits plateau once total protein reaches roughly 1.6 g/kg/day (with a confidence-interval ceiling near 2.2 g/kg/day). This provides the corpus's anchor for total-intake recommendations, complementing the per-meal threshold (cpt01, cpt03), distribution (cpt02), and aging (cpt04) citations in the protein-timing cluster.
DOI: 10.1136/bjsports-2017-097608 · PubMed 28698222 · Publisher