T. J. Clark Liquid Vanadium Formula. Vanadium (V), atomic number 23, is a trace element that is present at low levels (nanograms per gram or less) in most plant and animal tissues. The highest concentrations of vanadium in mammalian tissues are in kidney, spleen, liver, bone, testes and lung. The total human body content is believed to be between 0.1 and 1 mg. Bioavailability is very low, usually found to be less than 1% of an administered dose. Thus, most ingested vanadium is excreted unabsorbed. The best food sources include parsley, black pepper, dill, mushrooms and shellfish. Fresh fruits, legumes and dairy products usually contain very low levels of vanadium; however, processing (e.g., to produce dried milk powder or canned apple juice) increases vanadium levels.