Generally, the dosage of vitamin D preparation is 400IU, that is, 10 microgram, that is, 400 international units. And 1 microgram is equal to 0.00 1 mg, then 400iu vitamin d is 0.0 1 mg.

In addition, vitamin D can also promote the growth and differentiation of skin cells and regulate immune function. Ordinary adults often bask in the sun to avoid malnutrition. Infants, pregnant women, nursing mothers and elderly people who seldom go out should increase the supply of vitamin D to 10 microgram per day (equivalent to 400 international units). Children who lack vitamin D will suffer from rickets, and adults will suffer from osteomalacia.

Extended data:

The conversion values of different elements are different (international regulations):

Vitamin A: 1IU=0.3μg and 1000μg= 1mg.

Vitamin E: 1IU= 1mg.

Conversion between IU (International Unit) and quality-some professional unit conversion methods! (IU 1U).

Conversion between international units and quality.

1IUVa=0.33μg？ 1iu β -carotene = 0.6 μ g.

Retinol equivalent (μg) = va (μ g)+0.1.67× β -carotene (μ g).

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