Vanadium is a chemical element, which is listed in the list of elements as number 23, defining its atomic number. It is a metal and does not have a prominent role in human biology. It has shown in rats and chickens that a vanadium deficiency may result in reduced growth and reproduction deficiencies. Vanadium sulfate is deemed a very popular dietary supplement for the interaction with blood insulin. While providing some glucose control in people suffering from type 2 diabetes, proof for the claimed effect with body building athletes has not yet been scientifically established. In athletes with high levels of energy requirements a stabilized blood sugar may result in prolonged endurance, furthermore, vanadyl sulfate has gained popularity because of the apparent muscle recovery effect.