Rehmannia

Strong traditional standing and active preclinical research (especially the compound catalpol); rigorous human trials are limited. Most use is within multi-herb formulas rather than as a single agent.

Benefits

A fundamental 'blood and yin tonic' in TCM
used traditionally for fatigue
the kidneys
and women's health. Prepared (cooked) and raw forms are used differently.

Key compounds

Iridoid glycosides (catalpol)polysaccharides

May help with

Fatigue
dizziness
night sweats
menstrual irregularity (traditional context)

Best for these goals

Blood tonickidney supportvitality

How to use it

Decoction; core ingredient in many classic formulas; capsule

Evidence level

Limited

Cautions & interactions

May cause digestive upset, especially the raw form. Can affect blood sugar. Usually used within formulas under a practitioner's guidance. | Consult clinician: Diabetes medication, digestive weakness, pregnancy/nursing.

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Educational information only — not medical advice, and not evaluated by the FDA. These statements are not intended to diagnose, treat, cure, or prevent any disease. Talk to a qualified healthcare provider before using any ingredient therapeutically, especially if pregnant, nursing, or taking medication.

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