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Limited evidencePhysical performance

Maral Root

A Siberian ecdysterone source with a Soviet sports-science legend behind it and almost no modern human data. The one relevant trial used isolated ecdysterone, not maral root — and found the capsules contained a fraction of what the label claimed.

What the science says

  • It is a genuine, concentrated ecdysteroid source Moderate evidence

    Rhaponticum carthamoides (Leuzea, maral root) is one of the richest botanical sources of 20-hydroxyecdysone and related ecdysteroids, documented across decades of phytochemical work and used in the Soviet Union as the preparation Ecdisten. That much is well characterised. What is not characterised is how much ecdysterone any given commercial root extract actually delivers, since standardisation claims range widely and are rarely verified.

  • Muscle and strength gains Limited evidence

    The best human data is a 10-week resistance-training study in 46 young men using ecdysterone capsules — not maral root. Participants receiving ecdysterone showed significantly greater increases in muscle mass and in one-repetition-maximum bench press, with no rise in liver or kidney markers. Two important caveats: it is a single study with modest group sizes, and analysis of the supplement found the capsules contained substantially less ecdysterone than labelled, so the effective dose is unknown. The authors recommended WADA add ecdysterone to the prohibited list.

  • Adaptogen, endurance and 'anti-fatigue' claims Limited evidence

    Most endurance and work-capacity claims trace to Soviet-era research that is unblinded, poorly reported, and largely unavailable in indexed peer-reviewed form. Modern reviews of R. carthamoides pharmacology describe adaptogenic, anabolic and antioxidant activity almost entirely from animal experiments. No placebo-controlled trial of maral root itself for endurance, recovery or stress exists.

Dosage & safety

Studied doseCommercial maral root extracts are usually sold at 500-1000 mg/day standardised to 5-10% ecdysterones, nominally supplying 25-100 mg of ecdysteroids. The human trial used ecdysterone capsules labelled 100 mg each at two or eight capsules per day, though analysis showed far less actual ecdysterone was present. No dose is validated for maral root as such.
SafetyNo serious adverse effects have been reported and the ecdysterone trial found no liver or kidney marker abnormalities over 10 weeks, but long-term human safety data do not exist. Ecdysterone has been on the WADA Monitoring Program since 2020 — not currently prohibited, but under active surveillance, and the study authors formally proposed adding it to class S1.2 'other anabolic agents'; tested athletes should check current WADA status before using it. Rhaponticum is an Asteraceae plant, so allergy cross-reactivity applies. Stimulating effects are reported anecdotally — dose earlier in the day if it disrupts sleep. Avoid in pregnancy, breastfeeding and in adolescents, and be aware that products marketed around anabolic claims are a common target for undeclared adulteration.

Scientific references

Where to buy

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