Substrate ·evidence-based
interventions / Creatine / strength

Does Creatine help strength? (Grade A evidence)

For strength, Creatine has Grade A evidence: repeated randomised trials converge on a real, meaningful effect, especially in training adults. Studied doses: 3–5 g/day.

Bottom line. For strength, Creatine has Grade A evidence: repeated randomised trials converge on a real, meaningful effect, especially in training adults. Studied doses: 3–5 g/day. []

Direction
benefit
Magnitude
reliable improvement in strength/power with resistance training
Grade
A
Certainty
high
Clinical meaning
moderate
Who it applies to
training adults
Dose / form studied
Safety
none identified in this claim
The one limitation
Sample sizes are small in most included trials; effect sizes may shrink with larger studies.

Reviewed · Evidence last changed · Claim clm_ec_creatine_strength v1

Reviewed by Substrate editorial, Independent research collective

Grade
A
what does the grade mean?
Certainty
high
what does certainty mean?

Grade A / high: consistently helps at meaningful doses; new studies would need to reverse a large body of RCT evidence to change this.

Who it works for

Best-studied in training adults. Effective doses cluster around 3–5 g/day.

Why this grade

Reasoning trace

Grade A at high certainty. The grade reflects the direction and size of the effect across the 0 publishable sources above; certainty reflects heterogeneity, sample sizes, and design quality. What would move it upward: additional well-powered RCTs in the target population that replicate the effect at similar doses. What would move it down: a large null trial, discovery of publication bias, or a retraction of a keystone study.

Dose & form

Studied intake: 3–5 g/day.

How it stacks up for strength

Grade history

No grade changes yet. Initial grade assigned; re-reviewed on every 12 months (Grade A/B). Methodology v1.

Re-review cadence: every 12 months (Grade A/B) · methodology v1.

Frequently asked

How long does Creatine take to work for strength?

Trials of Creatine for strength typically report effects within 2–4 weeks, though individual response varies. Studies rarely find benefit inside 1 week for chronic outcomes.

What dose was used in studies of Creatine for strength?

Studied doses for Creatine in strength trials cluster around 3–5 g/day. See the dose block for the specific range and how it varies by form.

Does Creatine work for strength if I'm not deficient?

The effect concentrates in training adults. If your baseline is normal, expect a smaller effect than the trial averages.

Creatine or the next-best alternative for strength?

See the compare block above for the head-to-head with the most-cited alternative. Grade + certainty differences matter more than any single trial.

Related

What this is — and is not

Evidence description
reliable improvement in strength/power with resistance training
Substrate's interpretation
Grade A at high certainty — the direction and size the studies converge on, as our reading of the corpus.
Discuss with a clinician
If you're on medication or have a condition that changes the calculus, bring the interaction & population blocks above to your pharmacist or prescriber before deciding.
Individualized medical advice
Not provided here or on any Substrate surface (API, agent tool, embed) — see YMYL policy.

Cite this page

Reuse under CC-BY 4.0 with attribution to evidencebased.info.

Plain-text citation
Substrate. Does Creatine help strength? (Grade A). https://evidencebased.info/interventions/creatine/strength. Updated 2026.
BibTeX
@misc{substrate_ionscreatinestrength,
  author = {Substrate editorial},
  title  = {Does Creatine help strength?},
  year   = {2026},
  url    = {https://evidencebased.info/interventions/creatine/strength},
  note   = {Grade A, evidencebased.info}
}

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