Supplement evidence

050 / 575Performance

Branched-chain amino acids (BCAAs)

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The short answer

They provide amino acids, but complete protein already contains BCAAs.

Evidence and scope: Common claim not supported
This status does not grade the ingredient for every goal, outcome, or person.
Important limitation: With adequate high-quality protein, added BCAAs have little evidence for more muscle, recovery, or performance.
Before deciding: May add cost, GI symptoms, and amino-acid imbalance without clear benefit.

01 / PRACTICAL GUIDE

Dose, absorption, and combinations

These are indication-specific reference or studied ranges—not a personalized prescription. Start with the objective, then check the form, label, medicines, and health conditions.

Reference range by objective

Strength and training5–10 g around training is common in studies, but complete protein is generally preferable

Reference or studied range—not a personalized prescription. The product label or a clinician may specify a different dose.

Dose source ↗

More is not automatically better. A clinician or product label may specify a different amount.

Absorption / solubilityWater-soluble

Water-soluble or readily water-dispersible. This does not mean excess is always harmless.

How it is commonly taken

Use only after total protein adequacy is assessed.

Do not combine casually

Maple-syrup urine disease, pregnancy, diabetes medicines, and levodopa require caution.

Dose and use source ↗

Dose and use links lead to primary or official source material. Search links are discovery tools, not proof that every returned paper applies.

02 / EVIDENCE

What the research says

We keep supportive, mixed, negative, safety, and contextual findings together. The headline never replaces the underlying papers.

4research papers in this ledger

25unique primary studies represented

479unique participants represented

These are audited counts for this JIVANA collection, not search-result totals. Participants are counted once when multiple papers use the same cohort; review papers are not added again to participant totals.

Open the research timelineResearch timeline

Entries are ordered by publication year. A study period appears only when the source reports it.

2024

Mixed or qualifiedPMID 38625669

Attenuating Muscle Damage Biomarkers and Muscle Soreness After Exercise-Induced Muscle Damage with BCAA Supplementation

CK improved only immediately and at 72 hours, soreness at 24–96 hours, and LDH never did. The timing-specific pattern and overlapping trials limit claims of broad recovery.

Published: 202418 primary studies represented

Study design and methods

Design: Systematic review, meta-analysis, and meta-regression of 18 randomized trials
Population: Healthy active participants after resistance or endurance exercise
Intervention: BCAAs versus placebo or control
Outcome: Creatine kinase, LDH, and delayed-onset muscle soreness through 96 hours

Funding or conflict note: Substantial overlap with the broader 25-study synthesis means this update is not counted again.

Open research record ↗

2022

Mixed or qualifiedPMID 36235655

Oral Branched-Chain Amino Acids Supplementation in Athletes

Performance and body-composition benefits were negligible; soreness sometimes improved after resistance exercise and endurance findings were inconsistent. Most studies did not report total daily protein intake.

Published: 202224 primary studies represented

Study design and methods

Design: Systematic review of 24 studies
Population: Athletes and regularly training adults
Intervention: Oral BCAA supplementation
Outcome: Anabolic signaling, performance, body composition, soreness, and endurance findings

Funding or conflict note: Study overlap is substantial and total-protein context is usually missing, so this review is excluded from aggregate totals.

Open research record ↗

2021

Mixed or qualifiedPMID 34612716

The effect of branched-chain amino acid on muscle damage markers and performance following strenuous exercise

Some damage biomarkers and soreness were lower at selected time points, but muscle performance did not improve at 24 or 48 hours. Biomarker and soreness changes should not be described as faster functional recovery.

Published: 2021n=479 participants25 primary studies represented

Study design and methods

Design: Systematic review and meta-analysis of 25 studies
Population: 479 mostly young active adults; 26% were women
Intervention: BCAA supplements versus placebo around muscle-damaging exercise
Outcome: Creatine kinase, LDH, myoglobin, soreness, and muscle performance at 24–48 hours

Open research record ↗

2021

Mixed or qualifiedPMID 34072718

Does BCAA Supplementation Attenuate Muscle Damage Markers and Soreness after Resistance Exercise in Trained Males?

CK improved at early time points and soreness only before 24 hours, while LDH did not. The narrow male trained population and overlapping studies preclude a general performance claim.

Published: 20219 primary studies represented

Study design and methods

Design: Meta-analysis of nine randomized trials
Population: Resistance-trained men
Intervention: BCAAs versus control around resistance exercise
Outcome: Creatine kinase, LDH, and soreness over follow-up

Funding or conflict note: These trials are represented in the broader synthesis and are excluded from aggregate totals.

Open research record ↗

Unscreened discovery appendix—not evidence557 candidate publicationsSearch run: Aug 21, 2026

Complete for the displayed PubMed query at the search timestamp—not for all databases or every possible synonym. Candidates can be irrelevant, duplicate the same study, or report negative findings. They are never summed as evidence or participants until screened.

03 / SOURCES

Start with the source material

Official evidence overviewNIH Office of Dietary Supplements Live PubMed discovery searchNational Library of Medicine

The live search is for discovery only. Search-result counts change and are not included in the audited totals above.

Recent PubMed discovery recordsDirect links to the first 12 records returned by the reproducible search. These are discovery candidates—not reviewed summaries or a count of supportive findings.

04 / EXPERT CONTEXT

Expert context—not evidence

Expert positions are dated context—not scientific evidence. They never raise the evidence status or become consensus by repetition.

No direct, source-verified endorsement is currently recorded. Research authorship or discussion alone is not treated as endorsement.