This stuff really works!
I've been using M-Drive Elite since it came out and M-Drive before that, for the last 5 years. I was 43 when I first tried it (48 now) and saw an immediate boost in strength and endurance. I've been taking it ever since. My workout buddies and I do obstacle course racing, primarily Spartan Races, and M-Drive is a big reason why, at 46, 48 and 57, we're all still able to compete at a high level and enjoy the results. It gets my highest recommendation!