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Moderate evidencePhysical performance

Fava Bean Protein

A legume protein powder free of soy, dairy and gluten. Small human trials suggest it supports muscle about as well as milk protein over weeks, though one study found no acute effect on muscle protein synthesis.

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What the science says

  • Comparable to milk protein over weeks Moderate evidence

    A randomized trial in healthy young men found a Vicia faba peptide supplement no different from milk protein for changes in muscle size during short-term immobilization, and it produced higher muscle protein synthesis rates during remobilization.

  • No acute effect in one small trial Limited evidence

    A randomized controlled trial in 16 young adults found that 0.33 g/kg of fava bean protein did not raise myofibrillar protein synthesis at rest or after resistance exercise compared with an amino-acid-free control.

  • Plant protein in general holds up Moderate evidence

    A meta-analysis of 16 RCTs found no difference between animal and plant protein for absolute lean mass or muscle strength, with a small advantage for animal protein on percent lean mass in adults under 50.

Dosage & safety

Studied dose20–40 g per serving, as with other protein powders. Trials used roughly 0.3 g per kg of body weight per dose.
SafetyPeople with G6PD deficiency should avoid fava products because of the risk of favism (hemolysis); protein isolates remove most, but not necessarily all, of the vicine and convicine responsible. Fava is high in FODMAPs and commonly causes gas and bloating.

How to take it

TimingTiming does not matter; spreading protein across meals beats clustering it around training.
With food?Either alone or in food — mixing into a meal usually helps the gas.
Worth knowingStart at half a serving for a week; the FODMAP load is what makes most people quit, and it eases with gradual exposure.

Frequently asked questions

Is fava bean protein good for building muscle?

Fava bean protein has moderate evidence: in a randomized trial in young men it was no different from milk protein for muscle size during short-term immobilization and gave higher muscle protein synthesis on remobilization. One small trial found no acute rise in muscle protein synthesis, so results are mixed.

How much fava bean protein per serving?

Use 20–40 g of fava bean protein per serving, as with other protein powders; trials used roughly 0.3 g per kg of body weight per dose. Spreading protein across meals beats clustering it around training.

Is fava bean protein safe with G6PD deficiency?

People with G6PD deficiency should avoid fava bean protein because of the risk of favism (hemolysis). Protein isolates remove most, but not necessarily all, of the vicine and convicine responsible.

Does fava bean protein cause gas and bloating?

Fava bean protein is high in FODMAPs and commonly causes gas and bloating. Start at half a serving for a week and mix it into a meal; tolerance usually improves with gradual exposure.

Scientific references

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