I started taking ZMA afew weeks ago and so far it hasent been anything to mention but last night I had the vividest dream I ever had in my life! was it due to zma? who knows, but i woke up like WTF
LOL, sounds like a plan, buy something that has ingredients in it that directly inhibit the uptake of other ingredients in the same product....now that sounds like a smart way to spend money.
Truth be told those that benefit most from ZMA are those with or near deficiency. Or those who have trouble sleeping or do serious HIIT/tabata style workouts.
Also keep in mind like any supplement, there is no real governing body so there is no one to guarantee the brand you tried even has decent ingredients. Its easy to go out buy a sup and say a given product is junk when the product may not even contain the advertised amount if active ingredient.
If you try a product and cant tell the difference in a month then chances are its not needed by you. Or perhaps the manufacturer is peddling junk.