Creatine phosphate

Amino-acidCreatine derivative

What is it

Creatine phosphate (phosphocreatine) is the high-energy storage form of creatine inside muscle. Supplement labels sometimes list creatine glycerol phosphate or similar variants marketed as enhanced delivery forms.

Evidence for 1 use

AI-assisted evidence assessment — talk to your doctor before relying on any single supplement.

Strength and power performance

Strong Evidence

Creatine consistently improves high-intensity exercise capacity and lean mass in trained and untrained populations. Evidence is for creatine monohydrate primarily.

How it works

Inside muscle, creatine kinase transfers a phosphate group from phosphocreatine to ADP, rapidly regenerating ATP for short bursts of activity. Total muscle creatine content (free creatine plus phosphocreatine) is the meaningful target for ergogenic effects, regardless of which form is consumed orally. Orally administered creatine phosphate is hydrolyzed in the gut to free creatine, so it does not deliver intact phosphocreatine to muscle. Standard creatine monohydrate is the most studied and cost-effective form.

Dosage

Standard creatine dosing is 3 to 5 g/day of creatine monohydrate, or an optional 20 g/day loading phase for 5 to 7 days followed by 3 to 5 g/day. There is no clinical advantage to creatine phosphate forms.

When and how to take it

Daily timing is not critical for total muscle saturation. Post-workout with carbohydrate may modestly improve uptake.

2 commercial forms

Compare the main delivery options and what they’re best suited for.

Creatine monohydrate (best evidence)

Gold standard for evidence and cost.

Approximately 99% absorbed.

Creatine phosphate or creatine glycerol phosphate

No advantage over monohydrate.

Hydrolyzed in gut to free creatine.

Safety

Creatine is one of the most studied supplements and is generally safe at typical doses. Mild GI upset, water retention, and small rises in serum creatinine (a normal lab consequence, not kidney injury) are common.

Who should be cautious

Avoid in pre-existing kidney disease unless a clinician confirms safety. Pregnancy data are limited but no specific concerns identified.

Interactions

No significant medication interactions established at typical doses. People on nephrotoxic drugs should discuss with a clinician.

Food sources

Cooked beef

Amount
100 g
%DV
—

Frequently asked questions

Is creatine phosphate better than creatine monohydrate?⌄

No. There is no evidence of clinical advantage; monohydrate is cheaper and best studied.

Do I need to load creatine?⌄

Loading saturates muscle faster (days vs weeks), but daily 3 to 5 g without loading achieves the same end state.

References

Creatine phosphate on Wikidata — Wikidata link

Creatine phosphate on NIH DSLD (US supplement label database) — NIH Dietary Supplement Label Database link

Research on Creatine phosphate (PubMed search) — PubMed link

Track Creatine phosphate with Pilora

Set up dose reminders, check interactions, and join the community in the Pilora iPhone app.

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Evidence-based·How we grade evidence

Disclaimer: These statements have not been evaluated by the FDA. This page is educational, not a substitute for personalized medical advice. Evidence grades are AI-assisted assessments — talk to your doctor before starting any new supplement, especially if you’re pregnant, breastfeeding, on medications, or managing a chronic condition.