T Fuel - Tongkat ali is a natural source of compounds known as quassinoids. These compounds release the luteinizing hormone, which assists the body in producing greater levels of testosterone. The herb also increases the rate of free testosterone from the binding hormone sex-hormone-binding-globulin (SHBG).

Estro Shield - Getting and maintaining an erection requires a fragile balance of testosterone and estrogen. An elevated estrogen level can tip this balance, resulting in erectile dysfunction. This can be even more prominent if you also have reduced testosterone levels.

Stress Less - Generally, chronic stressors will lead to a reduction in Testosterone due to the effects of the HPA in response to stress. Cortisol and testosterone have an inverse relationship, and testosterone tends to limit the stress response (Pasquali, 2012; Rubinow et al., 2005).

Z Fuel - But guided and appropriate supplementation may help raise your testosterone levels. One study researched the effects of a magnesium and zinc supplement. It found that men who received 30 milligrams of zinc per day showed increased levels of free testosterone in their bodies

D Fuel - For most men, a higher vitamin D intake will probably not strongly influence the concentration of testosterone, but men with vitamin D deficiency might consider vitamin D supplements to boost the concentration of testosterone in the body and perhaps also fertility.