Limited evidenceStress & mood

Adaptogen Blends

Multi-herb formulas built around ashwagandha, rhodiola, eleuthero and similar plants. Some individual ingredients have decent trial support, but the blends as sold are rarely tested as blends.

Evidence last reviewed: August 2026

What the science says

Individual adaptogens for stress symptoms Moderate evidence
A systematic review of Withania somnifera and Rhodiola rosea found consistent reductions in perceived stress and anxiety scores across randomized trials, and a separate meta-analysis in people with mental disorders found ashwagandha improved anxiety and depression measures. Trials were mostly small, short and heterogeneous in extract and dose.
Tested fixed combinations Limited evidence
A randomized, quadruple-blind, placebo-controlled trial of a fixed rhodiola-schisandra-eleuthero preparation in patients with long COVID reported faster symptom recovery. This is one trial of one specific formula and does not generalize to other blends.
Proprietary multi-herb formulas Limited evidence
Most commercial adaptogen blends combine five or more herbs at doses well below those used in the positive single-ingredient trials, and have no published human data of their own.

Dosage & safety

Studied doseNo dose applies to blends as a class. Where a blend is used, check that it delivers a studied amount of at least one ingredient — for example 300–600 mg/day of a standardized ashwagandha root extract, or 200–400 mg/day of rhodiola.

SafetyDepends entirely on the ingredients. Ashwagandha has been linked to case reports of liver injury and can raise thyroid hormone levels; rhodiola may cause agitation and insomnia; licorice, common in these blends, can raise blood pressure and lower potassium. Multi-herb formulas make interactions harder to predict — avoid in pregnancy, breastfeeding, autoimmune thyroid disease and with immunosuppressants unless cleared by a clinician.

Scientific references

Clinical evidence for the adaptogenic effects of Withania somnifera and Rhodiola rosea - A systematic review with molecular interpretation of psychometric outcomes
Łuszczak J, Kocki J — Ann Agric Environ Med, 2026
The effect of Withania somnifera (Ashwagandha) on mental health symptoms in individuals with mental disorders: systematic review and meta-analysis
Marchi M, Grenzi P, Travascio A — BJPsych Open, 2025
Efficacy of Adaptogens in Patients with Long COVID-19: A Randomized, Quadruple-Blind, Placebo-Controlled Trial
Karosanidze I, Kiladze U, Kirtadze N — Pharmaceuticals (Basel), 2022

Where to buy

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