Force Factor Zinc Magnesium Aspartate is the best zinc for testosterone support. The ideal combination of zinc, magnesium, and vitamin B6 will increase testosterone production and male performance. The formula contains BioPerine black pepper fruit extract and selenium, which increases bioavailability. This means that the product promotes quick absorption and optimal performance. In addition, the supplement will boost your energy, immune system, and muscle health while increasing your strength and power.