Macro partitioning
Animal-based proteins stimulate muscle protein synthesis and support muscle mass more effectively than plant-based proteins due to higher digestibility, superior essential amino acid profiles (particularly leucine), and lower amino acid oxidation.
If your goal is maximizing muscle growth, prioritize animal proteins (whey, casein, meat, eggs) because they are digested faster and contain more leucine, which triggers muscle building more efficiently. If you rely on plant proteins, you must consume larger quantities (e.g., >30g per meal) or blend sources (like rice and pea) to ensure you get enough of all essential amino acids, particularly leucine, to overcome their lower digestibility.
The majority of these studies have reported that good-quality animal proteins have a greater ability to enhance muscle protein synthesis rate and support muscle mass than plant-based proteins
Why this rating
Based on a critical review of multiple clinical and animal studies showing consistent trends, though individual study results vary.
Source
The Role of the Anabolic Properties of Plant- versus Animal-Based Protein Sources in Supporting Muscle Mass Maintenance: A Critical Review
Insaf Berrazaga et al. · Nutrients · 2019
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