From the Vendor: Harvested from only the most mature leaves, our Malay kratom is then finely ground to the consistency of powder sugar for maximum absorption. Malay kratom is known for its strongly euphoric and gently energizing effects. It becomes relaxing at higher quantities. Malay is also known for its long lasting effects, which can be up to 8 hours in duration. It is surprising that this variety is not more widely used and is considered a gem by many kratom researchers.