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Open WellbeingWhat the studies actually measured

Energy and exercise

Beta-Alanineand Running Speed

Only one source here so far, and it found no clear difference in running Speed.

How sure anyone can be

Low certainty, level 2 of 4

Further research is likely to change this.

The numbers reported

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

-0.207-0.018 standardised effect size0.17

This range crosses the no-difference line, so these numbers fit a real difference and no difference at all equally well.

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

One source, 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 · 17 studies pooled

    Low certainty, level 2 of 4

    No ergogeniceffect of β-alanine on repeated sprint ability: a systematic review and multilevel meta-analysis of randomized controlled trials.

    Front Nutr. 2026;13:1818755. doi:10.3389/fnut.2026.1818755. PMID:41971372.

    Number reported
    -0.018 standardised effect size
    Which way it went
    No clear difference
    Likely range
    -0.207 to 0.17
    Source’s own words
    standardised mean difference (Hedges' g) in mean repeated-sprint performance vs placebo
    Who was studied
    Adult
    Compared with
    placebo
    Amount taken
    Not in the abstract
    For how long
    14 days (upper bound: 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: indirectness and imprecision
    1. Starts at High
    2. Indirectness brought it down to Moderatethe outcome measured is a proxy for the target outcomeReported in the abstract
    3. Imprecision brought it down to Lowthe confidence interval includes no effectReported in the abstract
    4. Ends at Low2 steps down.
    Checked, nothing to step it down for
    risk of bias
    Inconsistency
    No high disagreement reported between the 17 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

  • One do not say how many people took part.
  • Amount taken — 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

  • Running Speed

    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.