Several benefits here depend entirely on whether an underlying deficiency exists — worth understanding why guessing is a poor substitute for actually checking.
Zinc's role in testosterone production is genuine, but supplementing it reliably helps only men who are actually deficient — a blood test tells you that; a supplement label cannot.
If you suspect a deficiency is driving low energy or libido, a doctor's evaluation and appropriate blood work is the reliable path — this formula is not a diagnostic tool, and treating it as one risks missing the actual cause.
60-day money-back guarantee, per the manufacturer.