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Cornsilk (maize silk, yumishu, zea mays): Dosing and Uses

 

Classes: Urology, Herbals

Medically reviewed by Min Clinic Staff | Updated: January 2026

Suggested dosing of Maize silk, yumishu (cornsilk)

 

Dried style/stigma

4-8 g PO TId

 

Tea

One cup of tea several times a day

Steep 0.5 grams dried corn silk in 150 mL boiling water 5-10 minutes, strain

 

Liquid extract of maize stigmas

4-8 mL PO

 

Tincture (1:5 in 25% alcohol)

5--15 mL PO TId

 

Syrup of maize stigmas

8-15 mL PO

 

Suggested uses of Maize silk, yumishu (cornsilk)

Cystitis, prostatitis, urinary problemsCystitis, urethritis, nocturnal enuresis, prostatitis, acute chronic inflammation of the urinary system, as a diuretic for congestive heart failure, to treat diabetes, & hypertension

 

Efficacy

Insufficient reliable information about effectiveness

 

Maize silk, yumishu (cornsilk) adverse (side) effects

None

 

Warnings

None

 

Pregnancy and lactation

Pregnancy category: N/A

Lactation: N/A

 

Pregnancy categories

A: Generally acceptable. Controlled studies in pregnant women show no evidence of fetal risk.

B: May be acceptable. Either animal studies show no risk but human studies not available or animal studies showed minor risks and human studies done and showed no risk.

C: Use with caution if benefits outweigh risks. Animal studies show risk and human studies not available or neither animal nor human studies done.

D: Use in LIFE-THREATENING emergencies when no safer drug available. Positive evidence of human fetal risk.

X: Do not use in pregnancy. Risks involved outweigh potential benefits. Safer alternatives exist.

NA: Information not available.

 

Pharmacology of Maize silk, yumishu (cornsilk)

Metabolism: N/A

Excretion: N/A

 

Mechanism of action

Diuretic