How Much Protein for Recovery? The Distribution Question

Ask how much protein you need for recovery and you’ll get a number — but the more useful question is often about timing and spread, not just the daily total. The research here is unusually mature for a nutrition topic, which lets us separate what’s well established from what’s a small refinement worth bothering with only at the margins.

Total intake comes first

The single most important variable is how much protein you eat across the whole day. The most cited evidence is a 2018 systematic review and meta-analysis by Morton and colleagues in the British Journal of Sports Medicine, pooling 49 randomized controlled trials and 1,863 participants. It found that protein supplementation augmented gains in muscle mass and strength during resistance training, but that the benefit to fat-free mass plateaued at a total intake of about 1.62 g/kg/day (95% confidence interval 1.03–2.20). Above that breakpoint, more protein bought no extra muscle in the pooled data. Hit a sensible total and you’ve done the large majority of the work.

Where distribution earns its keep

Once total intake is adequate, how you spread it has, at most, a smaller effect — and the controlled evidence is mixed. Each meal triggers a discrete pulse of muscle protein synthesis (MPS) that responds to a dose of high-quality protein and then plateaus. In a 2018 review in the Journal of the International Society of Sports Nutrition, Schoenfeld and Aragon suggested roughly 0.4 g/kg per meal across about four meals as a practical way to reach the ~1.6 g/kg/day target. The logic is sound, but when distribution has been tested head-to-head, the effect on actual muscle has been hard to detect.

The honest framing: distribution is a refinement, not a foundation. In controlled trials, holding total intake constant, even versus skewed distribution has not reliably changed muscle protein synthesis.

A 2022 randomized controlled trial in Nutrients (Justesen et al., 24 healthy older adults) compared even versus skewed protein distribution at a fixed 1.5 g/kg lean mass per day and found no significant difference in muscle protein fractional synthesis rate (2.16 vs 2.23 %/day, p = 0.647) or in how dietary protein was used. A 2024 trial in The Journal of Nutrition (Church et al., 30 middle-aged and older adults) found that within a two-meal pattern, total intake of 1.5 g/kg/day produced a more positive whole-body net protein balance than 0.8 or 1.1 g/kg/day — but again, muscle fractional synthetic rates did not differ. Total amount drove the result; the meal pattern did not.

A skimmable summary

Total daily protein is the dominant factor — get this right first; ~1.6 g/kg/day is a well-supported target for trained people.
A reasonable dose at each of several meals (~0.4 g/kg) is a sensible default, not a proven requirement.
Trials holding total intake fixed have generally found even vs skewed distribution makes no measurable difference to muscle protein synthesis.

The takeaway

For recovery, prioritize hitting an adequate daily protein total — roughly 1.6 g/kg/day, with diminishing returns above that. Spreading it across three or four meals is a reasonable habit, but be skeptical of strict timing rules sold with certainty: in controlled trials, distribution effects on muscle have been small or undetectable once total intake is held constant. This is a case where the boring fundamentals do almost all the work.

Total intake comes first

Where distribution earns its keep

A skimmable summary

The takeaway

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