I have been using it for about 1.5 years I was a heavy duty gardener/landscaper these past two years. very very physical, heavy hard work for a 46 year old! The second year I was drinking FRS (concentrate) in the morning and then at lunch. I found that in the second year I was not as sore after work. I order off the website because if you schedule it you can get it cheaper. I do not sell it or anything so this is heartfelt