One, the concept is different

1, cod liver oil: cod liver oil is extracted from the liver of shark, cod and other fats.

2, vitamin D: vitamin D for steroid derivatives, is cyclopentane polyhydrophenanthrene compounds.

Two, nature

1, cod liver oil: yellow, fishy odor, mainly contains vitamin A and vitamin D.

2, vitamin D: vitamin D are different vitamin D original by ultraviolet irradiation of derivatives. It exists in some natural food, the human body subcutaneous storage of 7-dehydrocholesterol generated from cholesterol, irradiated by ultraviolet light, can be transformed into vitamin D3. vitamin D's maximum absorption peak of 265nm, relatively stable, dissolved in organic solvents.

Three, role

1, cod liver oil: for the prevention and treatment of night blindness, rickets and so on.

2, vitamin D: maintain the stability of serum calcium and phosphorus concentrations; promote pregnancy and lactation to transport calcium to the substrate; can reduce the tolerance of insulin; have immunosuppressant effect; vitamin D can be strong bones, prevention of rickets in children and osteoporosis in the elderly.

Baidu Encyclopedia - Cod Liver Oil

Baidu Encyclopedia - Vitamin D