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Jade Windscreen (Yu Ping Feng) — the classic defence formula 玉屏风散

Immune System 增强免疫 early evidence
What the evidence says:
Multiple randomized trials (mostly in China, moderate quality) report fewer recurrent respiratory infections in children and adults taking Yu Ping Feng San preventively.

How to make it

Classically 黄芪 : 白术 : 防风 at 2:2:1, decocted. Today most people use pharmacy granules — follow the pack. Taken through autumn/winter by people who "catch everything".

Why it works

Pair with adequate protein and vitamin-D-rich foods — the formula supports, diet builds.

Classical source

From Danxi Xinfa 丹溪心法 (Yuan dynasty, ~1300s). The name: a "jade screen" shielding the body from wind.

Cautions: Prevention formula, not a treatment for an active cold. See a professional for the right dose.

Herbs used

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