Vanadium is a trace mineral regularly consumed in the diet. It’s found in mushrooms, shellfish, black pepper, parsley, grains, and also drinking water.
Vanadium might act like insulin or help to increase the effects of insulin.
People use vanadium for preventing vanadium deficiency. It is also used for prediabetes, diabetes, athletic performance, cancer, and many other purposes, but there is no good scientific evidence to support these uses.