Scurvy juice, which is high in vitamin C. Though redundant in the presence of a balanced diet, various nutritional supplements are available that provide ascorbic acid well in excess of that required to prevent scurvy. Some animal products, including liver, muktuk (whale skin), oysters, and parts of the central nervous system, including the adrenal medulla, brain, and spinal cord, contain large amounts of vitamin C, and can even be used to treat scurvy. Fresh meat from animals which make their own vitamin C (which most animals do) contains enough vitamin C to prevent scurvy, and even partly treat it. In some
Vitamin A deficiency to the liver, maximising the VAD. Treatment of VAD can be undertaken with both oral Vitamin A and injectable forms, generally as vitamin A palmitate. The richest animal sources of vitamin A (retinol) are livers (beef liver - one ounce provides around 8,000 IUs ) and cod liver oil - one teaspoon provides around 4,500 IUs ). Researchers at the U. S. Agricultural Research Service have been able to identify genetic sequences in corn that are associated with higher levels of beta-carotene, the precursor to vitamin A. They found that breeders can cross certain variations of corn to produce a