Corn (Zea mays Poaceae)

Other Names: Sweet Corn

Corn, a robust annual plant native to the Andes and Central America, grows up to three meters tall. Its long, striped leaves are alternately placed and fold downward at regular intervals. Female flowers, located around the stem’s midpoint, produce cylindrical cobs filled with grains, enveloped by silky stalks and large bracts. Male flowers, forming delicate tufts in inflorescences, grow at the stem’s top.

Parts for Use

Leaves (Corn Silk) and Grains (Cobs)

1. Cobs are harvested in summer before pollination, and the silky leaves, known as corn silk, are carefully removed.
2. Corn silk is dried quickly or used fresh to prepare infusions and extracts.
3. Corn oil, derived from grains, is used in food, medicines, and cosmetics.

Ingredients

Corn silk contains saponins, tannins, phytosterols, mucilage, potassium, and essential oil. Corn oil from grains constitutes up to 20% of their content and is rich in healthy unsaturated fatty acids.

Use in Treatment

Corn silk is valued for its anti-inflammatory and diuretic properties, supported by scientific studies, making it effective for cystitis, urinary tract inflammation, water retention due to poor kidney function, and kidney stones. It is also used to reduce inflammation in gout. Corn silk preparations may stimulate bile secretion, potentially benefiting gallbladder and liver disorders. Additionally, it is believed to help lower blood pressure and blood sugar levels, though these uses require medical supervision due to potential risks. Corn oil is commonly used in cosmetics to maintain skin moisture and prevent wrinkles. Use for kidney stones, gallbladder, liver, blood pressure, and blood sugar levels must be guided by a healthcare professional.

Cultivation

Corn is grown from seed, sown in late spring in rich, well-drained soil. It thrives in sunny locations.

Preparation and Dosage

For Internal Use (Cystitis, Urinary Tract Inflammation, Water Retention, Kidney Stones)

1. Infusion: Steep 1 teaspoon of dried corn silk in 1 cup of water, bring to a quick boil, let stand for 5 minutes, strain, and drink 1 cup 3 times daily.
2. Capsules (150 mg dry extract): Take 2–4 capsules daily.

Warnings

1. Consult a healthcare professional before use, especially for kidney stones, gallbladder, liver, blood pressure, or blood sugar levels.
2. Pregnant and breastfeeding women should avoid large amounts of corn oil.
3. Cosmetics containing corn oil may cause dermatitis in individuals with sensitive skin.