Melatonin is widely used as a dietary supplement to help regulate sleep patterns, particularly for individuals experiencing insomnia, jet lag, or shift work sleep disorder. It is often taken orally in tablet or capsule form to promote relaxation and improve sleep quality. Additionally, melatonin is used in some medical treatments to address circadian rhythm disorders in blind individuals or those with delayed sleep phase syndrome. Beyond sleep-related applications, melatonin is also being studied for its potential antioxidant properties and its role in supporting immune function. In veterinary medicine, it is sometimes used to manage sleep and behavioral issues in animals. Its use should always be guided by appropriate dosage recommendations and medical advice.