Corn
玉蜀黍 · Yù Shǔ Shǔ
Eases urinary issues and supports gentle digestion
What it does
Maize gently regulates digestion and helps with urinary issues like edema and stones. In TCM, it's a sweet, neutral grain that increases appetite when food just doesn't appeal, and it boosts lung function for mild dry cough. Corn silk is the more famous urinary herb, but the kernel itself has documented mild diuretic effects.
How to take it
Simmer 30–60g of dried corn kernels (or corn silk) in 4 cups water for 30 minutes. Strain and sip the broth daily for mild diuretic support and gentle digestion.
Try corn silk tea daily for mild fluid retention
Cook fresh corn on the cob. Add to soups, stir-fries, or salads. Use cornmeal in bread, polenta, and cakes.
Boil corn on the cob and brush with butter, salt, and a squeeze of lime
Safety
- Very safe as food
- Whole-corn fiber may cause bloating in sensitive guts
- Some people are sensitive to corn proteins
- Limit if on diuretic medications, since it adds mild diuretic effect
- Talk to your doctor before starting medicinal use, especially if you take medication
Where it comes from
Maize (Zea mays) is native to the Americas and reached China through Portuguese trade in the 16th century. Despite arriving relatively late, it became a Chinese dietary staple, especially in northern provinces. In TCM, the kernel itself has gentle digestive and diuretic uses, while corn silk (Yù Mǐ Xū) is a more focused urinary herb. Two clinical trials explore corn's metabolic effects, primarily for diabetes management.