Kratom is a tropical tree native to South Asia. Kratom leaves or extract from its leaves have been used in alternative medicine for chronic pain and other conditions.Many people also use kratom to self-treat symptoms of depression or anxiety.The active ingredient in kratom is called mitragynine. Mitragynine binds to opioid receptors in the brain, relieving pain.Kratom’s active ingredient, mitragynine, is found in its leaves.Kratom can be ingested in a variety of forms such as capsules,tablets,gum,tinctures and extracts.