Supplement analysis backed by scientific evidence · PT

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Limited evidencePhysical performance

Arachidonic Acid

An omega-6 fatty acid sold to amplify the inflammatory signal that drives training adaptation. The two proper RCTs disagree on muscle and strength outcomes, and deliberately raising arachidonic acid intake carries real trade-offs.

What the science says

  • Increases lean mass and strength Limited evidence

    The two controlled trials conflict. At 1,500 mg/day for 8 weeks in 30 trained men, lean body mass rose 2.9%, upper-body strength 8.7% and peak power 12.7% in the arachidonic acid group only. At 1,000 mg/day for 50 days in 31 trained men, there were no significant differences from placebo in body composition, bench or leg press 1RM, hormones, or muscle biopsy markers of hypertrophy. The positive study was partially funded by the ingredient's manufacturer.

  • Improves anaerobic power output Limited evidence

    This is the one outcome both trials agreed on: Wingate relative peak power was significantly higher after supplementation in the 50-day study and 12.7% higher in the 8-week study. It is a narrow endpoint from two small trials, not a broad performance benefit.

  • Amplifies the anabolic inflammatory response to training Limited evidence

    Four weeks at 1,500 mg/day transiently increased the acute inflammatory response to a resistance exercise bout in trained men, consistent with arachidonic acid being the substrate for prostaglandin synthesis. A larger inflammatory signal is a plausible mechanism, not evidence of better long-term adaptation, and the same trials showed it does not reliably translate into muscle.

Dosage & safety

Studied doseThe RCTs used 1,000-1,500 mg/day of arachidonic acid for 50 days to 8 weeks, split across meals. A typical Western diet already supplies roughly 100-250 mg/day, so supplementation is a five- to fifteen-fold increase over habitual intake. No dose-response or long-term dosing data exist.
SafetyArachidonic acid is the direct precursor to pro-inflammatory eicosanoids and thromboxanes, and supplementing shifts the omega-6 to omega-3 balance in cell membranes. Short trials found no adverse changes in blood lipids or clinical chemistry, but there is no long-term safety data at these doses. Avoid if you have an inflammatory condition (rheumatoid arthritis, inflammatory bowel disease, asthma), a bleeding disorder, established cardiovascular disease, or take anticoagulants; NSAID use will blunt the proposed mechanism. Not currently prohibited in sport.

Scientific references

Where to buy

ALLMAX, Essentials, Arachidonic Acid+, 120 Capsules

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