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Pea Protein (Pisum sativum isolate)
A well-digested plant protein. In small trials it matched whey for muscle protein synthesis with training, but it did not significantly reduce muscle damage after exercise where whey did. A leading vegan protein option.
What the evidence says
Pea Protein doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from high-quality randomised trials published 2018–2026 with a typical study size of 47 participants.
Based on 25 studies · 21 RCTs · 124 total participants
Confidence
Moderate confidenceBy outcome
Small RCTs show pea protein is well digested and supports muscle protein synthesis with training no differently from whey, but it did not significantly reduce exercise muscle damage where whey did. The small trial base and absence of meta-analyses cap it at Moderate.
28 trials ongoing or recruiting · 93 completed on ClinicalTrials.gov
1 of the completed trials have posted results
Registered trials show research momentum for Pea Protein, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Oct 2026
Pea protein (from Pisum sativum, yellow peas) is a popular plant-based protein isolate. It's rich in lysine and BCAAs (including leucine) and naturally lower in methionine. Its ileal digestibility did not differ significantly from casein in one 15-person trial, although some amino acids were less digestible.
In one 27-person trial, muscle protein synthesis with training showed no significant difference between pea and whey diets. After muscle-damaging exercise, whey lowered damage markers in two trials and pea protein did not do so significantly, and whey raised blood amino acids more than pea.
It's the leading hypoallergenic, vegan alternative to dairy proteins.
Provides lysine and BCAAs (incl. leucine) that drive muscle protein synthesis.
Ileal digestibility not significantly different from casein (93.6% vs 96.8%), though some amino acids, including leucine, were less digestible.
How Pea Protein works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Discuss total protein intake with your clinician.
Generally fine as a food protein.
No notable drug interactions; very high protein intakes warrant caution in kidney disease. This possible interaction has not been individually evaluated for this supplement; its likelihood and severity are unknown. If you take an anticoagulant or antiplatelet medicine, ask a pharmacist or prescriber before using this product. Do not stop or change prescribed medicines based on this notice.
Tip: Reduce serving; split doses
Tip: Avoid if legume-allergic
Pea Protein has an evidence score of 5.5/10 — moderate evidence based on 25 indexed studies. A well-digested plant protein. In small trials it matched whey for muscle protein synthesis with training, but it did not significantly reduce muscle damage after exercise where whey did. A leading vegan protein option. Representative study: PMID 40806155.
The commonly studied dose of Pea Protein is 20-25 g per serving (aim for about 2-3 g leucine, and about 0.7-1 g protein per lb bodyweight in total daily). The one cited trial that states a dose used 25 g a day. Label servings go up to 40 g, above that dose. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
Timing is flexible for Pea Protein — consistent daily use matters more than the time of day. Total daily protein matters most; a serving around training is useful.
Pea Protein is generally well-tolerated and considered safe for most healthy adults at recommended doses. Reported side effects include allergic reaction, bloating/GI upset. How often they occur is not established for all of them. Use caution if any of these apply to you: Pea/legume allergy.
Creatine
Likely helpsIncreases phosphocreatine stores for faster ATP regeneration, boosting strength, power output, and cognitive function under stress.
Whey Protein
Likely helpsComplete protein with high leucine content that maximizes muscle protein synthesis.
Casein Protein
Too few graded studiesForms a stomach gel for 6-8 hours of sustained amino acid release — ideal for overnight muscle recovery and anti-catabolism.
BCAAs
Likely helpsLeucine, isoleucine, and valine metabolized directly in muscle tissue — support protein synthesis and reduce exercise fatigue.
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Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 25 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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