Fish liver oil contains more vitamin A and more vitamin D per unit weight than any other common food. One hundred grams of regular cod liver oil provides 100,000 IU of vitamin A, almost three times more than beef liver, the next richest source; and 10,000 IU vitamin D, almost four times more than lard, the next richest source. Of course, cod liver oil is only consumed in small amounts, but even a tablespoon (about 15 grams) provides well over the recommended daily allowance for both nutrients.

			Take one fish liver oil softgel containing 10,000 IU Vitamin A and 400 IU Vitamin D daily. (If you are allergic to fish, take capsules or tablets of fish-free, dry Vitamin A, 10,000 IU and fish-free, dry Vitamin D, 400 IU.)