Any good brands for these two items? they should be kept separate or is a combination ok?
Yea buy them seperately. The guy would created ZMA patented his formula so it is expensive to buy (It's like $20 for 30 doses). You can go to a walmart and buy zinc and magnesium seperately. That would probably be the cheapest route.
Exactly what I do, cheaper and more effective because you can dose according to personal needs. I've tried higher quality brands but the real life effects seem to be virtually the same as the walmart stuff for me.