ZMA/ Zinc, especially for Males, a supplement that should be on everyones list, not really for bodybuilding applications, but more for general health.
If you are in your late 30's or up, take ZMA or Zinc.
If you're young like most of us, and you really push yourself in the Gym and enjoy having your dick pointing in the sky when you wake up in tha morning, then also take Zinc.
If you are on a cycle, Take zinc. If you are coming off of a cycle, Take zinc.
Do not go over 75mgs a day.
30 - 50 is a great dosage.