The economic and economical method of adjusting immunity and strengthening skeleton
The skin of human body can synthesize vitamin D which is needed by human body by sunlight (mainly ultraviolet rays). Vitamin D is an essential fat soluble vitamin for human beings. Pure vitamin D is a kind of white crystal, soluble in fat and lipid solvent. Its physical and chemical properties are stable. General cooking will not cause the loss of vitamin D, but it can cause damage when fat is rancid.
There are at least five forms of vitamin D, the most significant being cholecalciferol (vitamin D3) and ergosterol (vitamin D2). Is it amazing that vitamin D3 can be synthesized...