This is an attempt at humor. I think. Don't pay attention to it.
ZMA is just zinc. It's the biggest scam to hit the supplement market in the last decade. It would be like making a supplement that contains Vitamin C and calling it "C-Bolic" and claiming it prevents loss of testosterone -- which it would, because if you got scurvy and died you'd lose testosterone! Sounds far fetched? That's the same logic Victor Conte used to become a millionaire selling zinc.
By the way, "Post-Cycle" from Protein Factory has the same dosage of zinc asparate as ZMA as well as a dozen other ingredients and it's cheaper.