Corn silk is the collection of long, silky threads pulled from inside a corn husk. Folk medicine has relied on it for generations to support urinary function and ease occasional urinary discomfort.
People usually brew it as a tea or take it as an extract. It acts as a mild diuretic that helps the body release extra water. Evidence for antioxidant and anti-inflammatory effects remains thin, with little robust clinical backing.
Daytime use helps prevent extra trips to the bathroom at night. Anyone taking diuretics, blood pressure medication, or diabetes drugs should be cautious, because corn silk can interact with those medicines. Skip it altogether if you have kidney disease or are pregnant or breastfeeding, unless a qualified professional directs otherwise.