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Cistanche

Cistanche ("desert ginseng") is heavily marketed for testosterone and libido, but the actual human trials tested mobility in older adults and cognition in combination with ginkgo — and found modest effects. There is no controlled human evidence that it raises testosterone.

What the science says

  • Modest improvement in mobility and locomotive function in older adults Limited evidence

    A placebo-controlled, randomized, double-blind Japanese trial of Cistanche tubulosa extract in adults with locomotive syndrome found improvements in walking-related function and subjective mobility scores over 12 weeks. This is a single trial with a modest sample and a manufacturer-linked extract, so it is a starting signal rather than an established effect.

  • Cognitive benefit shown only in a ginkgo combination product Limited evidence

    A randomized, double-blind, placebo-controlled study in middle-aged and elderly adults tested a combination of Cistanche tubulosa and Ginkgo biloba extracts and reported improvement on cognitive assessments. Because ginkgo has its own (contested) cognitive literature, the trial cannot attribute the result to cistanche. A separate randomized trial of the same combination reported reduced chronic fatigue symptoms, with the same attribution problem.

  • Testosterone and libido claims are not supported by human trials Limited evidence

    The "testosterone booster" positioning comes from rodent studies in which cistanche or echinacoside increased serum testosterone and sperm parameters, plus its traditional role as a kidney-yang tonic. No placebo-controlled human trial has measured serum testosterone, erectile function scores, or fertility outcomes with cistanche. Treat the hormone claims on the label as untested.

Dosage & safety

Studied doseThe locomotive syndrome trial used roughly 300 mg/day of a standardized Cistanche tubulosa extract for 12 weeks; the cognitive and fatigue trials used a fixed cistanche-plus-ginkgo combination rather than a standalone dose. Traditional decoctions use 6-10 g/day of the dried fleshy stem. Western capsules commonly supply 300-1,000 mg of extract, sometimes standardized to echinacoside and acteoside — those markers are the ones to look for, since unstandardized products vary enormously.
SafetyHuman trials to date report good tolerability with no serious adverse events, but the total number of people studied is small (a few hundred across all trials), so the safety picture is thin. Reported mild effects include digestive upset. Cistanche has traditional laxative use and can loosen stools at higher doses. Insufficient data in pregnancy, breastfeeding, and in anyone with hormone-sensitive conditions. Wild Cistanche deserticola is threatened and protected in parts of its range; cultivated C. tubulosa and C. deserticola dominate the legitimate supply, and species substitution in the raw-herb market is common. No hepatotoxicity or drug-interaction signal has been established, but absence of reports in a lightly studied herb is not evidence of safety.

Scientific references

Where to buy

Humanx, Cistanche+, 30 Capsules

View on iHerb

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