I'm 49 years old. I was so tired when I got home I couldn't work out, and would fall to sleep at 8:00pm, get up at 10:00pm, pull myself off of the sofa and plop in bed. I left the Alfa pxp Royale sitting in the cabinet, thinking...forbidden rice? , what the heck is that?. I took the stuff out, and mixed it in with my daily concoction of vitamins, whey protein, etc. that I take in hopes of working out-(I just rarely ever got there). I took one teaspoon full of this stuff, (Thursday) and worked out, completing a heavier workout, and, after work. Skipped Friday, but took a teaspoon. The next day, Saturday, I took the recommended 3 teaspoonfuls that day, and worked out in the morning, first with the treadmill, (I never do both treadmill and weights anymore) then with weights, then went on a bicycle ride-road bike-much further than normal. Then comes Sunday...I do the same thing, only I worked out my legs, had plenty of energy all day, both days, and gave some to my wife-who was sick with the flu. She got energy that lasted through the afternoon. No shakes, no side-effects detected, just consistent energy. I write this because I've literally tried everything, except those awful caffeine energy drinks, this was the only thing that has worked so far. I feel like I felt 6 years ago-this is great! *Disclaimer: All testimonials are opinions of individual customers. Individual results may vary.