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Adaptogens

Herbs said to help the body resist stress — what each one does, and who it actually helps.

Reviewed by Bodil Isaksson, Licensed Biomedical Scientist (Sweden)Last reviewed July 2026Supplement guide

SupplementsAdaptogensStress & energy

"Adaptogen" is a mid-20th-century Soviet term for plants said to raise the body’s non-specific resistance to stress — helping it stay balanced under mental or physical strain without over-stimulating it. It is a traditional and functional idea rather than a strict pharmacological class, and the evidence varies a lot from herb to herb. Below are the best-studied, pharmacy-available adaptogens, with what each does in the body and who benefits.

The essentials

  • Best evidence: ashwagandha (stress, cortisol, sleep) and rhodiola (stress-related fatigue, focus).
  • Classic tonics: Panax ginseng (fatigue, mild cognition) and schisandra (stamina + liver).
  • Effects are modest and gradual — give a course 4–12 weeks, and remember these are food supplements, not treatments for anxiety, depression or any disease.
The adaptogens

Also worth knowing

American ginseng (Panax quinquefolius) is a cooler, calmer cousin of Asian ginseng, studied for mental performance and blood-sugar control — a reasonable choice for people who find Korean ginseng too stimulating. Holy basil / tulsi (Ocimum sanctum) is an Ayurvedic adaptogen with small trials suggesting reduced stress and anxiety scores. Eleuthero (Eleutherococcus senticosus, “Siberian ginseng”) is a traditional endurance/anti-fatigue tonic, but it is not a true ginseng and has the thinnest human evidence of this group — a plausible endurance signal with an inconsistent stress benefit. These are worth knowing, though their evidence base is thinner than the four above.

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Educational content, not medical advice. These are food supplements, not treatments for disease.