Excesses of these vitamins are stored in the liver, and are not needed every day in the diet. For more information on fat-soluble vitamins, see fact sheet 9.315 Fat-Soluble Vitamins: A, D, E, and K. In contrast, water-soluble vitamins dissolve in water and are not stored by the body. Since they are eliminated in urine, we require a continuous daily supply in our diet. The water-soluble vitamins include the vitamin B-complex group and vitamin C.
Citrus fruits are near the top of the list for vitamin C-rich foods. Eight ounces of fresh-squeezed orange juice has nearly 125 milligrams of vitamin C. Diluted frozen orange juice from concentrate has a little less -- about 95 milligrams per 8-ounce glass. Raw white or pink grapefruit juice each provide more than 90 milligrams of the vitamin in an 8-ounce serving.
Interestingly, the natural juice was just as effective as the enriched juice. The researchers also determined that intestinal cells can absorb more citrulline from watermelon juice than from citrulline supplements, especially when the juice is unpasteurized. 2. It helps heart health.