Life Extension(R) Only Trace Minerals is just that - only trace minerals. This mineral-boosting formula delivers zinc, copper, manganese, chromium, molybdenum, boron and vanadyl sulfate. Up your mineral levels today with Only Trace Minerals. Zinc is essential for multiple biochemical reactions and bodily processes and supports immune system function, a healthy insulin response and more. Copper also supports immune health as well as red blood cell production. Manganese is a trace mineral that promotes brain and nervous system health. Chromium helps maintain healthy blood sugar levels and more. Molybdenum is a cofactor for important enzymatic reactions in the body. Boron is key to healthy bones and vanadyl sulfate, a form of vanadium, supports thyroid health, iron metabolism and more.