Indian Corn, Yu Mi Xiu, Zea.
People Use This For:
Orally, corn silk is used for cystitis, urethritis, bedwetting,
inflammation of the
prostate, acute and chronic inflammation of the urinary system.
No concerns regading safety, available studies validate this
used orally in amounts commonly found in foods. Generally
Recognized as Safe
(GRAS) status in the US.6
No concerns regarding safety when used orally and appropriately
Pregnancy and Lactation: Refer to a Medical Herbalist
There is not enough scientific information available to comment
effectiveness of corn silk.
Mechanism of Action:
Corn silk contains tannins, which are astringent, and
cryptoxanthin, which has
vitamin A activity.8 Diuretic. Demulcent (mucilagenous).
bile flow). The diuretic and choleretic action has been
demonstrated in animal
studies.R5 In China it is used for Hepato-Biliary Disease.R6,R7
Interactions with Herbs & Supplements:
Herbs and Supplements with Hypotensive Effects: Corn silk is
thought to have
hypotensive effects, may have an additive effect with blood
Interactions with Drugs:
Antidiabetes Drugs: Theoretically, because some
evidence suggests corn
silk can reduce blood glucose levels, excessive amounts might
diabetes therapy.R1 pp.222
Diuretic Drugs: Additive Effect.R4
Lithium: Because of Diuretic effect.
Warfarin (Coumadin): Corn silk contains vitamin K. Individuals
warfarin should consume a consistent daily amount to maintain
Interactions with Foods:
Interactions with Lab Tests:
Interactions with Diseases or Conditions:
None within normal dose range.
Oral: 4-8 grams dried style/stigma three times
daily, or one cup tea (steep 0.5
grams dried corn silk in 150 mL boiling water 5-10 minutes,
strain) several times
daily.8,10 Liquid extract of maize stigmas, 4-8 mL.8 Tincture
(1:5 in 25% alcohol),
5-15 mL three times daily. 8 Syrup of maize stigmas, 8-15 mL.8
Dr Clare’s Comments:
Corn silk is the silky threads that surround the ear of
sweetcorn. It is one on the
few herbs that are more effective dried, probably because they
have such a high
water content it would take a lot of them to make an effective
It would be nice to think that Corn Silk would ‘treat’ high blood
however it is likely to be helpful in the way an extra portion of
fruit or vegetables
are helpful. It will not reduce a normal blood sugar or a normal
Blood Pressure in
my experience. Nor has it been reported, these are theoretical
Specific References: CORN SILK
6. FDA. Center for Food Safety and Applied Nutrition, Office of
Premarket Approval, EAFUS: A
food additive database. Available at:
McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal
Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for
Professionals. London, UK: The Pharmaceutical Press, 1996.
9. Brinker F. Herb Contraindications and Drug Interactions. 2nd
ed. Sandy, OR: Eclectic Medical
Wichtl MW. Herbal Drugs and Phytopharmaceuticals. Ed. N.M.
Stuttgart: Medpharm GmbH Scientific Publishers,
» DR CLARE'S MATERIA MEDICA