What’s the difference between kratom powder and kratom extract?

Generally, an equal weight of kratom extract contains more active ingredients and is more potent than kratom powder. Kratom powder usually refers to dried powdered leaves, whereas kratom extract is an end product of processing kratom leaves with a solvent to make a higher yield of active ingredients (such as mitragynine). The extract potency can vary greatly depending on the extraction solvent and process. For example, in a laboratory study, 600 mg of powdered kratom leaves extracted with water, ethanol, and methanol yielded approximately 60 mg of extract containing mitragynine at concentrations of 3.9 mg/g, 58.8 mg/g, and 35.9 mg/g, respectively.^[1]