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Limited evidencePhysical performance

ATP (Oral Adenosine Triphosphate)

Oral ATP does not survive digestion intact, and the impressive strength and hypertrophy results come almost entirely from one industry-linked research network with no independent replication. Mechanistically interesting, evidentially thin.

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What the science says

  • Increases muscle size and strength Limited evidence

    The headline trial (Wilson 2013) gave 21 resistance-trained men 400 mg/day for 12 weeks and reported a total strength gain of +55.3 kg vs +22.4 kg for placebo, vertical jump power +796 vs +614 W, and muscle thickness +4.9 vs +2.5 mm. Those effect sizes are larger than creatine typically produces, from a manufacturer-funded study by a single research group, and no independent laboratory has replicated them.

  • Improves repeated-sprint performance and recovery Limited evidence

    A 400 mg dose raised post-exercise whole-blood ATP levels, muscle excitability and performance after a repeated sprint bout in a small crossover trial. The study came from the same commercial research network that produced the chronic data, and the acute effect has not been confirmed elsewhere.

  • Refills intramuscular ATP stores Limited evidence

    This is the marketing rationale and it is not how the molecule behaves: ingested ATP is hydrolysed in the gut to adenosine and phosphate and does not cross into muscle intact. Any real effect would have to work through extracellular adenosine signalling, erythrocyte ATP and vasodilation, which remains a hypothesis rather than a demonstrated human mechanism.

Dosage & safety

Studied doseTrials used 400 mg/day of disodium ATP (the patented PeakATP ingredient), taken on an empty stomach about 30 minutes before training; acute studies used a single 400 mg dose pre-exercise. No dose-response work exists, and there is no evidence that more than 400 mg/day adds anything.
SafetyWell tolerated in 12-week dosing, with no clinically significant changes in blood chemistry or hematology reported. Mild GI upset is the most common complaint. Not prohibited in sport. No data in pregnancy, breastfeeding or children. Because the proposed mechanism runs through adenosine signalling, caution is reasonable for people with arrhythmias or taking dipyridamole or theophylline, though no interactions have been documented.

How to take it

TimingAbout 30 minutes before training.
With food?On an empty stomach — that is how every trial dosed it.
Worth knowingThere is no reason to take it on rest days; the only studied use is pre-exercise.

Frequently asked questions

Does oral ATP build muscle and strength?

The evidence for oral ATP is limited: the headline 12-week trial of 400 mg/day in 21 trained men reported large strength and muscle gains, but it was manufacturer-funded and no independent lab has replicated it.

Does oral ATP get into your muscles?

No. Swallowed ATP is broken down in the gut to adenosine and phosphate and does not reach muscle intact; any real effect of oral ATP would have to work through indirect signalling, which remains a hypothesis.

How should I take oral ATP?

Trials used 400 mg of disodium ATP on an empty stomach about 30 minutes before training. There is no evidence that more than 400 mg/day adds anything, and no reason to take it on rest days.

Scientific references

Where to buy

ProHealth Longevity, Longevity ATP, 400 mg, 90 Capsules

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