I started to use what is xamthone plus supplements and wanted to find it at a better price than I was paying locally. I feel that the supplement is working for me. I use the product with the whole fruit of the mangosteen. I work in a stressful environment. I also have to commute to the city every day. Everything from the work to the air I am breathing in the city increases the amount of free radicals my body has to deal with on a daily basis. Using a powerful antioxidant helps to rid my body of the free radicals and the damage they cause. No one can grow or buy mangosteen fruit in the U.S.