“Sunshine Vitamin” D is produced by many manufacturers. In addition, in pharmacies it can be found in an aqueous solution, in oil and in tablets.

How are these drugs different from each other? Which one is more efficient? How to determine who needs this vitamin and how much and what foods contain it?

told obstetrician-gynecologist, ultrasound diagnostician, deputy head physician for medical work Anastasia Zhdanova.

Vitamin D combines a group of vitamins – D1, D2, D3, D4 and D5. Of these, only two forms have important biological significance:

1) D3 – cholecalciferol.

80% of D3 is formed in the skin from cholesterol under the action of b-UV rays, and 20% come from food of animal origin (fish oil, liver, egg yolk).

2) D2 – ergocalciferol.

D2 enters the body only with plant products (bread, etc.).

According to clinical guidelines, the best drug for treating vitamin D deficiency is cholecalciferol (D3).

Recommended drugs for the prevention of vitamin D deficiency are cholecalciferol (D3) and ergocalciferol (D2).

Vitamin D is fat-soluble, so one of the most common dosage forms is an oily solution in liquid form or in the form of capsules. Such forms split longer than water ones. Vitamin D can be taken on an empty stomach or with food.

The bioavailability of these forms will depend on the state of the gastrointestinal tract. Oil solutions are not indicated for children and people with impaired gallbladder function, since the absorption of vitamin D in the intestine depends on the flow of bile there.

Just add water

Water forms of vitamin D do not need to be broken down. They are a micellar solution. An aqueous solution of vitamin D3 is absorbed 5 times faster than a fat-soluble one, reaches a higher concentration in the liver, where it is converted to its active form. The effect of taking comes faster: after 5-7 days, for oil – after 1-14 days. The effect also lasts longer – up to 3 months, unlike oil – up to 1.5-2 months. The use of such forms is possible even with diseases of the gastrointestinal tract and gallbladder. The disadvantages of water-soluble forms include the presence in their composition of preservatives, flavors and stabilizers within acceptable limits, but allergic reactions can develop on them, especially in patients prone to this.

The disadvantages of all liquid forms are dosing inaccuracies.

Tablet dose

Only tablets can provide the exact dosage.

From food, the maximum amount of vitamin D is found in fish oil – 400-100 IU per 1 tablespoon, it can be used to prevent and treat deficiency. In addition to 448 IU of vitamin D, one teaspoon of fish oil also contains vitamin A and polyunsaturated fatty acids.

Salmon, sardines, mushrooms, mackerel, herring, chicken and quail eggs, cod liver oil, dairy products, caviar are rich in vitamin D.

By the way

– The daily requirement of vitamin D for women and men aged 18 to 50 years is at least 600-800 IU.

– For people over 50, the required daily dose of vitamin D is at least 800-1000 IU.

– The daily norm of vitamin D for pregnant women is 800-1200 IU.

– Daily rate in the neonatal period 0-1 month. – 500 IU.

– The daily requirement of vitamin D for infants from 4 weeks to 1 year is 1000 IU.

– The daily dose of vitamin D for children from 1 to 3 years is 1500 IU.

– For children from 3 to 18 years old – 1000 IU, however, during the transitional age (during the period of physiological changes), the dose can be increased to 2000 IU.