Jade Windscreen (Yu Ping Feng San)

Some human studies (e.g., in recurrent respiratory infections and allergic rhinitis) suggest immune benefit; evidence is preliminary and mostly from China.

Benefits

A simple
classic three-herb TCM formula taken to strengthen the body's 'defensive Qi' — used traditionally to reduce susceptibility to colds and to support the immune surface.

Key compounds

Astragalosides and constituents of its three herbs

May help with

Frequent colds
low immunity
spontaneous sweating (traditional context)

Best for these goals

Immunityresiliencedefensive Qi

How to use it

Decoction; patent pill/granule, often taken preventively

Evidence level

Limited

Cautions & interactions

Contains astragalus — immune-stimulating, so caution with autoimmune disease and immunosuppressants. Best used under practitioner guidance. | Consult clinician: Autoimmune conditions, immunosuppressants, 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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