White mulberry leaf (Morus alba) has been used in traditional practices to support metabolic health.
People take it to maintain already-healthy blood sugar levels, particularly after eating. The leaf contains 1-deoxynojirimycin (DNJ), a compound that may slow carbohydrate digestion. Common forms include capsules, liquid extracts, and tea. Take it shortly before or with meals that contain carbohydrates.
White mulberry can lower blood sugar. If you take diabetes medications or insulin, use it only under medical supervision because it might cause hypoglycemia. Stop using it at least two weeks before any scheduled surgery, as it can affect blood sugar control during recovery. Safety during pregnancy and breastfeeding is unknown, so avoid it or consult a doctor.