If p = const., then dp = 0, and, from 1, p dV = R dT; i.e., the work done by the gas in expanding through the differential volume dV is directly proportional to the temperature change dT. If the gas has a specific heat at constant pressure of Cp, then dq = Cp dT, and, from 2 (with 3),
A dietary supplement is a product intended for ingestion that contains a dietary ingredient intended to add further nutritional value to (supplement) the diet. A dietary ingredient may be one, or any combination, of the following substances: a vitamin.
In other countries dietary supplements may be classified as drugs or another classification of products. There are more than 50,000 dietary supplement products marketed in the United States, and more than half of the adult population consume dietary supplements, with most common ones being multivitamins.