adun, I am based on how much extra energy I have throughout the day. Studies and research are incredibly important, don’t get me wrong, but if I didn’t feel better taking supplements, then I wouldn’t take them. I HAVE to notice a drastic improvement in energy to bother with it. I noticed a nice increase in energy with Mega Men, but GNC is expensive, and it wasn’t that much of a difference in the way I felt to warrant me continuing to take them. yes, it was a bit longer than 1 month, I’m thinking more like 3 or 4 I was on them. If you do like the Mega Men, great, but I’ll tell you this the “sport” version or whatever really isn’t worth the extra money.
I take lots of supplements, but I don’t take a multi at all anymore. Spirulina has replaced my multi. It gives me INCREDIBLE amounts of energy. I am far more energetic, throughout the entire day, I lift more, my stamina has skyrocketed, and my recovery time has decreased. Chlorella and spirulina algaes have taken the place of multis for me, IMO they are just better.
Other than that I just take now zinc, lecithin, calcium/magnesium/vitamin d, and a crapload of vitamin c as ascorbic acid.