Supplement analysis backed by scientific evidence · PT

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Moderate evidencePhysical performance

Pea Protein

Pea protein supports muscle gains when dosed generously - roughly 50 g/day in the one substantial trial - and performs close to whey. Its lower leucine and methionine content mean it is not gram-for-gram equivalent to dairy protein.

What the science says

  • Increased muscle thickness during 12 weeks of training Moderate evidence

    In 161 men doing 12 weeks of upper-limb resistance training, 25 g pea protein twice daily produced only a trend toward group differences in biceps thickness overall (p = 0.09). In the weakest participants at baseline, gains were +20.2% (pea), +15.6% (whey) and +8.6% (placebo), with pea significantly better than placebo and whey not different from either. Strength gains did not differ between groups, and the trial was run with the pea protein manufacturer.

  • Plant protein is roughly equivalent to animal protein overall Moderate evidence

    A meta-analysis of 16 RCTs found protein source did not affect absolute lean mass or muscle strength, though animal protein was favored for percent lean mass. In adults under 50, animal protein gave a small extra gain in lean mass (weighted mean difference 0.41 kg, 95% CI 0.08 to 0.74).

  • Amino acid profile requires larger doses Limited evidence

    Pea protein is limited in methionine and supplies roughly 8% leucine versus about 11% for whey, so per-meal doses need to be 1.3-1.5 times larger to match the muscle protein synthesis stimulus. This is mechanistic reasoning from leucine-threshold studies rather than a directly tested dosing protocol.

Dosage & safety

Studied dose25 g twice daily (50 g/day) in the main RCT. For a single post-training serving, 30-40 g is a reasonable target given the lower leucine density. Rice-pea blends are commonly used to cover the methionine gap.
SafetyGenerally well tolerated and not a top-8 allergen, though legume allergy is possible and rare cross-reactivity with peanut has been reported. Residual fiber and oligosaccharides cause gas and bloating in some users. Independent testing has repeatedly found higher cadmium and lead levels in plant protein powders than in dairy proteins, so choose third-party-tested brands if you use it daily.

Scientific references

Where to buy

California Gold Nutrition, Sport, Vegan Protein with Pea Protein Isolate and Brown Rice Protein, Vanilla, 2 lb (907 g)

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