What is the difference between vitamin D2 and vitamin D3?

There is a difference in the chemical formula, but the action on the human body and the mechanism of action are exactly the same.

Vitamin D2, also known as ergocalciferol, is a ring-opening steroid formed by the cleavage of chemical bonds of steroids under photochemical action, especially through ultraviolet light and ergosterol. Ergocalciferol may be used as a dietary supplement to supplement vitamin D, and ergocalciferol is just as effective as cholecalciferol (vitamin D3), which is produced in the presence of ultraviolet light.

Vitamin D3 is also known as cholecalciferol or cholecalciferol. The 7-dehydrocholesterol produced after cholesterol dehydrogenation can be irradiated with ultraviolet light to form cholecalciferol, so that is to say, the provitamin D of cholecalciferol is 7-dehydrocholesterol. Vitamin D3 is mainly synthesized by the human body itself, and the human body's ** contains a kind of cholesterol, which becomes vitamin D3 after being exposed to sunlight.

Therefore, if the child can fully receive direct sunlight** for more than 4-6 hours, the vitamin D3 synthesized by himself can basically be satisfied.

However, the physiological activity of D3 is stronger than that of D2, so as long as there is frequent sunlight exposure, vitamin D deficiency generally does not occur in the human body. The increased needs of children and the elderly can also be supplemented by dairy and cod liver oil.

Vitamin D2 is converted from ergosol of plant ergot strains, known as ergocalciferol, vitamin D3 is converted by 7-dehydrocholesterol, also known as calciferol, D3 is physiologically active than D2.

There is a layer of 7 dehydrocholesterol underneath our **, and as long as there is regular sun exposure, the body will synthesize vitamin D3. The daily requirement is between 400 and 800 IU.

Children and the elderly with vitamin D deficiency have increased needs and need to be supplemented with animal liver, dairy and cod liver oil.

Both vitamin D2 and vitamin D3 have the same physiological activity, both promote the deposition of calcium and promote growth. It's just that its chemical structure is different. Vitamin D2 and vitamin D3 have exactly the same effect and mechanism of action on the human body, and there is no difference between the use of the two by mammals and humans.

Now there are a lot of products that supplement vitamin D3, if there is a demand, it is recommended to choose a brand with guaranteed quality, I used Distool for my children, and the effect is not bad.

I haven't understood this problem, I gave the child D3, with the calcium supplement of the Dishibao family, the calcium supplement effect is very good, the child used to love cramps, and now there is basically no such situation.

The difference between vitamin D2 and D3 is not very big, they can promote the growth of the body and the intake of nutrients, but the way of intake is different, in comparison, vitamin D3 can be easier to act directly on the human body, and now there are many products that supplement vitamin D3, if there is a demand, it is recommended to choose a brand with guaranteed quality, I used Drip Shibao for my child, and the effect is not bad.

Vitamin 2 is a plant-based food, for example, yeast is a substance that is rich in vitamin 2. Vitamin 3 is not mainly obtained from plant foods, but can be synthesized by the body itself and obtained from animal foods. The human body contains a substance that can be converted into a third vitamin, which is called hydrogen cholesterol, but to be converted into a vitamin, the third needs sunlight.

Vitamin D3 is abundant in animal foods such as liver foods.