I'm 66 yrs old , going on the 3rd month taking two daily, my arms and legs are showing very noticeable muscle coming back like it was years ago before it disappeared. I'm bending over with no stress , my body , overall is performing at a higher level with my workouts and daily routine. This had been a very rewarding experience, my biceps and triceps are getting a nice toned appearance again , that I felt was long gone once I hit 63 , 64 . Thanks this is a wonderful product.