Protein synthesis
Muscle protein synthesis is the process by which the body builds new muscle protein; it rises after eating protein and after resistance training, and muscle is gained when it exceeds breakdown over time.
Muscle tissue is continuously built and broken down. Synthesis is the building side. Whether you gain, hold or lose muscle is the running balance between the two over weeks, not the size of any single spike.
What raises it
Two things, and they work better together than either alone. Eating protein raises synthesis for a few hours, with the response driven largely by the essential amino acid content of the meal. Resistance training raises it for considerably longer — a day or more in trained people — and makes the muscle more responsive to the protein that arrives during that window.
Why this justifies spreading protein out
Because the response to a single meal is limited and temporary, several moderate protein feedings across the day produce a better summed response than one very large one. Three to five meals containing roughly 0.3 to 0.4 g of protein per kilogram of bodyweight is the practical version of that finding.
Why it does not justify supplement marketing
The spike in synthesis after a meal is a laboratory measurement, not a proxy for muscle gained. Plenty of things raise it acutely without changing anything over twelve weeks. Total daily protein, progressive training and enough calories decide the outcome; timing adjusts it at the margin.
Sources
- 1.Protein supplementation and resistance training: a systematic review and meta-analysis — British Journal of Sports Medicine
- 2.Evidence-based recommendations for natural bodybuilding contest preparation — Journal of the International Society of Sports Nutrition
Related reading
- Protein timing: what matters and what doesn't
The anabolic window is wider than the supplement industry implied. What distribution actually does, how much per meal, and where timing genuinely helps.
- Progressive overload, in numbers you can check
Five ways to make a session harder than the last one, in the order they are worth using, and what a realistic rate of progress looks like by training age.
- How much protein do you actually need per day?
The RDA is a floor, not a target. What the evidence supports for people who train, how to reach it on Indian food, and why it is the one macro worth counting.
- Vegetarian protein worth the calories it costs
Ranked by calories per gram of protein, not by grams per 100 g. Which vegetarian sources are efficient, which are not, and how to build a 130 g day.