How much zinc is needed to maintain a healthy level of testosterone?

Zinc is used as a co-factor or enzyme activator to regulate cell proliferation, cell differentiation, and cell death; it also helps cells grow and repair; and zinc helps to maintain healthy immune function. Numerous research papers found that athletes had a higher zinc intake than the general population. It is noted that zinc should be taken at 30 mg a day and due to the healing benefits of zinc, weight lifters are encouraged to increase their zinc intake to help repair muscle damage and promote growth.