Protein & Nutrition Blog – Marmels

Bar chart of muscle protein synthesis response across per-meal protein doses from 10 to 50 grams, with the 30-gram dose highlighted as the practical maximal threshold

Protein & Nutrition Blog – Marmels

How Much Protein Per Meal Maximizes Muscle Growth?

by Mo Mandegar, PhD on May 14 2026
Most adults treat dinner as the protein meal and let breakfast and lunch slide, missing two of the day's three potential muscle- building pulses. Muscle protein synthesis works on a per-meal trigger, with a leucine threshold near 2.5 to 3 grams. Research suggests 25 to 40 grams of high-quality protein at three to four meals a day, spaced 3 to 4 hours apart, maximizes 24-hour synthesis. Here is what the latest science says about the dose, the distribution, and how to actually hit the target.