Herbal supplements are products derived from plants, including their oils, roots, leaves, seeds, berries or flowers. Many have been used for centuries and may have particular health benefits and healing properties. 

Herbal medicine is used to treat many conditions, such as allergies, asthma, eczema, premenstrual syndrome, rheumatoid arthritis, fibromyalgia, migraine, menopausal symptoms, chronic fatigue, irritable bowel syndrome, and cancer, among others.