8 Vitamins That Are a Total Waste of Money—and Could Even Be Dangerous BETA-CAROTENE For most healthy adults, the recommended daily allowance of beta-carotone (in the form of vitamin A) is 3,000 IU for males and 2,130 IU for females. Some of its highest food sources include carrots, spinach, kale, and cantaloupe. Next 1 2 3 4 5 6 7 8 2017-09-13 admin Share ! tweet