What is the difference between a compound and a molecule? A compound is a substance that is composed from two or more different elements. Water (H 2 O), table salt (NaCl), carbon dioxide (CO 2), methane (CH 4) and chlorophyll (C 55 H 72 O 5 N 4 Mg) are a few examples of compounds. They are compounds because they each contain more than one kind of element.
Recommended Daily Intake for Optimal Health. Based on the most recent research, the current recommendation is 35 IUs of vitamin D per pound of body weight. So for a child weighing 40 pounds, the recommended average dose would be 1,400 IUs daily, and for a 170-pound adult, the dose would be nearly 6,000 IUs.
This is partly because people spend more time indoors, wear sunblock outside and eat a Western diet low in good sources of this vitamin. The Reference Daily Intake (RDI) is 400 IU of vitamin D per day from foods, but many health organizations recommend getting 600 IU (3). If you donât get enough sunlight, it should probably be closer to 1,000 IU per day (4). Here are 9 healthy foods that are high in vitamin D.