From what I've read, yes they can be stacked. MMV2 is a DHT percursor, thus great for strength, and hardening effects. M1D is their test precursor, thus giving all the great benefits one would see with increased testosterone. Directions for dosages are on the bottle with at least one dose taken preworkout(may vary with MMV2 if workouts are late evening due to it's energy/stim effect). I'm sure a LG rep will be in shortly to tell you a little more.