Get the High Quality Ultra Enhanced Indo Kratom Capsules from Kratom Caps. Ultra Enhanced Indo is one of the best known Kratom extracts on the market. UEI Veggie Capsules in stock. Buy now! This enhanced Kratom Extract is the product of months of research from some of the best in the business. UEI is probably the most popular Kratom Extract and for good reason. It's contains 25 alkaloids isolated from Kratom making it a broad spectrum extraction.