With both Yellow Vein and White Vein Kratom strain types being drawn from the same herb, Yellow vein Kratom is derived from the young leaves of the White Vein Kratom. Yellow Thai Kratom is the result of an ancient and complex drying process that leads to a completely unique alkaloid profile. This strain has origins in Thailand but has since been grown throughout Southeast Asia. Each of our Kratom products is ethically harvested. We test our product in accordance with GMP regulation of square root of the lot size (n) + 1. Every lot we touch is tested 8+ times for salmonella, e.coli, staph, yeast, mold, and to confirm its 100% all natural Mitragyna Speciosa.