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Vitamin D2 is also known as ergocalciferol, and vitamin D3 is also known as cholecalciferol.. This is important for patients who have purchased a dietary supplement that does not indicate the specific type of vitamin D in the product by number but have listed the scientific name.uman beings do not make vitamin D2, and most healthy fish contain vitamin D3. Vitamin D3 is the same price as vitamin D2. Vitamin D3 may be less toxic than D2 because higher concentrations of D2 circulate in the blood when consumed (compared to vitamin D3).
Vitamin B2 is a water-soluble vitamin, one that cannot be stored by the body except in insignificant amounts. It must be replenished daily. Like the other B vitamins, it supports energy production by aiding in the metabolising of fats, carbohydrates, and proteins.iboflavin or vitamin B2 is an essential nutrient in human nutrition and plays a key role in the production of energy. Vitamin B2 is needed to process amino acids and fats, activate vitamin B6 and folic acid, and help convert carbohydrates into the fuel the body runs on.