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Pea Protein (Pisum sativum isolate)
A well-digested plant protein that supports muscle protein synthesis and recovery comparably to whey when dosed adequately — the leading vegan protein option.
What the evidence says
Most Pea Protein studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from high-quality randomised trials published 2018–2026 with a typical study size of 47 participants.
Based on 23 studies · 21 RCTs · 154 total participants
Confidence
Moderate confidenceBy outcome
Several RCTs show pea protein supports muscle protein synthesis and recovery comparably to whey when adequately dosed, but the small trial base and absence of meta-analyses cap it at Moderate.
16 rigorous studies
16 randomized trials · 0 meta-analyses · 0 systematic reviews
Our evidence rating for Pea Protein is accountable to this entire body of rigorous research indexed in PubMed — not a hand-picked subset.
PubMed · as of Jul 2026
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momentum for Pea Protein, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed.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 Sep 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, when dosed adequately, supports muscle protein synthesis and post-exercise recovery comparably to whey in several trials.
Its digestibility is good though slightly below whey/casein, and it's naturally lower in methionine. It's the leading hypoallergenic, vegan alternative to dairy proteins.
Provides lysine and BCAAs (incl. leucine) that drive muscle protein synthesis.
Good ileal digestibility (slightly below whey/casein), delivering amino acids effectively.
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 11 indexed studies. A well-digested plant protein that supports muscle protein synthesis and recovery comparably to whey when dosed adequately — the leading vegan protein option. Representative study: PMID 40806155.
The commonly studied dose of Pea Protein is 20-40g per serving (aim for ~2-3g leucine; ~0.7-1g protein/lb bodyweight total daily). 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 are uncommon and include bloating/GI upset, allergic reaction. 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 — most researched protein supplement worldwide.
Casein Protein
Likely helpsForms a stomach gel for 6-8 hours of sustained amino acid release — ideal for overnight muscle recovery and anti-catabolism.
BCAAs
Probably helpsLeucine, isoleucine, and valine metabolized directly in muscle tissue — support protein synthesis and reduce exercise fatigue.
Explore: Best supplements for Athletic Performance
Reviewed by Dr. Baher Al Hakim · Last reviewed June 2026 · evidence from 23 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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