Sumatra White Vein is harvested in Sumatra. This kratom has a slightly different composition of alkaloids compared to the red kratoms. White Sumatra has a more stimulating effect and gives a more euphoric feeling. This kratom provides more endurance during work or training. I often use this kratom often in the gym. Note that you only get these effects at low doses. When using a high dosage of any kratom the sedative effects will prevail.