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Open WellbeingWhat the studies actually measured

Energy and exercise

Beta-Alanineand Exercise Capacity

Both sources here measured higher exercise Capacity.

How sure anyone can be

Moderate certainty, level 3 of 4

Further research may change this.

The most certain of the two findings here; each record carries its own.

The numbers reported

One source’s range, drawn against its own line of no difference and scaled to its own numbers.

0.20.49 standardised effect size0.79

This range stays on one side of the no-difference line.

Bar the confidence interval — the range the true effect is likely to sit inNotch the number the source reportedLine where there would be no difference at all

Two sources, newest first

What we read is the published abstract, not the full paper, so a blank below may still be printed in the paper itself. A fixed rule worked this out from the source’s own fields. Nobody checked this rating by hand.

  • Systematic review, 2026 · 8 studies pooled · 187 participants

    Moderate certainty, level 3 of 4

    Effects of beta-alanine supplementation on exercise performance and related physiological outcomes in women: a systematic review and meta-analysis.

    Front Nutr. 2026;13:1857513. doi:10.3389/fnut.2026.1857513. PMID:42370349.

    Number reported
    0.49 standardised effect size
    Which way it went
    Higher
    Likely range
    0.2 to 0.79
    Source’s own words
    standardised mean difference in time to exhaustion vs placebo
    Who was studied
    Adult female
    Compared with
    placebo or control
    Amount taken
    Not in the abstract
    For how long
    Not in the abstract
    Disagreement between studies
    I2 = 0%
    Kind of record
    Journal article
    How this rating was reachedstarts at High, one step down: imprecision
    1. Starts at High
    2. Imprecision brought it down to Moderate187 participants is below the 400-participant optimal information size floorReported in the abstract
    3. Ends at ModerateOne step down.
    Checked, nothing to step it down for
    risk of bias and indirectness
    Inconsistency
    No high disagreement reported between the 8 studies it pooled

    Imprecision stops at the first check that applies; others may apply too.

    AI-reviewed & signed — an AI agent re-read this finding against the saved source and checked that the quote, the numbers, the units and the direction match it. No person read it. The owner authorised the agent to sign the batch with the owner's key, and every build rechecks that signature against these exact bytes.

    Read the abstract on PubMed

  • Systematic review, 2017 · 40 studies pooled · 1,461 participants

    Low certainty, level 2 of 4

    β-alanine supplementation to improve exercise capacity and performance: a systematic review and meta-analysis.

    Br J Sports Med. 2017;51(8):658-669. doi:10.1136/bjsports-2016-096396. PMID:27797728.

    Number reported
    0.18 standardised effect size
    Which way it went
    Higher
    Likely range
    0.08 to 0.28
    Source’s own words
    overall pooled standardised effect size across 70 exercise measures (capacity and performance) vs placebo
    Who was studied
    Adult
    Compared with
    placebo
    Amount taken
    Not in the abstract
    For how long
    Not in the abstract
    Disagreement between studies
    Not in the abstract
    Kind of record
    Journal article
    How this rating was reachedstarts at High, 2 steps down: risk of bias and imprecision
    1. Starts at High
    2. Risk of bias brought it down to Moderatethe abstract reports no risk-of-bias or quality appraisal, so study limitations cannot be ruled outNot in the abstract
    3. Imprecision brought it down to Lowthe interval excludes no effect but spans a 4-fold range of effect size, from trivial to largeReported in the abstract
    4. Ends at Low2 steps down.
    Checked, nothing to step it down for
    indirectness
    Inconsistency
    No high disagreement reported between the 40 studies it pooled

    Imprecision stops at the first check that applies; others may apply too.

    AI-reviewed & signed — an AI agent re-read this finding against the saved source and checked that the quote, the numbers, the units and the direction match it. No person read it. The owner authorised the agent to sign the batch with the owner's key, and every build rechecks that signature against these exact bytes.

    Read the abstract on PubMed

What is still missing from these readings

  • Amount taken — Not in the abstract.
  • For how long — Not in the abstract.

Something nobody wrote down is never a zero and never a guess.

Still to read for Beta-Alanine

One of the eight things on our list for Beta-Alanine has no reading here yet:

  • Cycling Power

Still to read means nobody here has got to it, not that it was tried and did nothing or that no research exists. A pairing on no list is not a gap: we never set out to read it.

Read next

  • Beta-Alanine

    Six other questions read for it

  • Energy and exercise

    26 questions read under it

  • Exercise Capacity

    No other ingredients read against it

    Alphabetical, and by nothing else.

This is a library, not advice. No recommendation, no dose, no diagnosis, no ranking. We never ask about your symptoms, and nothing here is tailored to you.