O.P.M.S Silver is known to be very different strain than others, its stronger and tends to have a stronger effect. It’s because it entails a mixture of plain leaf and a certain amount of extract.
Mitragyna Hirsuta commonly known as “Kra-Thum-Khok” in its native regions of Cambodia, Thailand and Vietnam. There is a alkaloid within Mitragyna Hirsuta that is very similar to Mitragynine which is found in Kratom. The alkaloid is named Mitraphylline. Mitragyna Hirsuta is related to kratom also know as Mitragyna Speciosa. It is a milder version of Kratom so it still bears similar effects.