What is a common source of vitamin D?

July 19, 2019 Off By idswater

What is a common source of vitamin D?

Foods that provide vitamin D include: Fatty fish, like tuna, mackerel, and salmon. Foods fortified with vitamin D, like some dairy products, orange juice, soy milk, and cereals. Beef liver.

What is the precursor molecule for vitamin D?

25OHD, the precursor of calcitriol, is the major circulating form of vitamin D; it circulates bound to a specific plasma carrier protein, vitamin D binding protein (DBP). DBP also transports vitamin D and calcitriol.

Which of the following is found in the composition of vitamin D?

vitamin D2, found in plants and better known as ergocalciferol (or calciferol), and vitamin D3, found in animal tissues and often referred to as cholecalciferol. Both of these compounds are inactive precursors of potent metabolites and therefore fall into the category of prohormones.

Which fruit contain vitamin D?

For this reason, some countries fortify orange juice with vitamin D and other nutrients, such as calcium ( 39 ). One cup (237 ml) of fortified orange juice with breakfast can start your day off with up to 100 IU of vitamin D, or 12% of the DV ( 40 ).

Where are vitamin D 2 and vitamin D 3 found?

In general, vitamin D 2 is found in fungi and vitamin D 3 is found in animals. Vitamin D 2 is produced by ultraviolet irradiation of ergosterol found in many fungi. The vitamin D 2 content in mushrooms and Cladina arbuscula, a lichen, increase with exposure to ultraviolet light.

What is the molecular structure of vitamin D?

Structure Vitamin D 1: Mixture of molecular compounds of ergocalciferol with lumisterol, 1:1 Vitamin D 2: ergocalciferol (made from ergosterol) Vitamin D 3: cholecalciferol (made from 7-dehydrocholesterol in the skin). Vitamin D 4: 22-dihydroergocalciferol: Vitamin D 5: sitocalciferol (made from 7-dehydrositosterol)

What are the biological effects of vitamin D?

Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and multiple other biological effects.

What foods have the most vitamin D in them?

Only a few foods, such as the flesh of fatty fish, naturally contain significant amounts of vitamin D. In the U.S. and other countries, cow’s milk and plant-derived milk substitutes are fortified with vitamin D, as are many breakfast cereals.

Where does vitamin D2 and vitamin D3 come from?

Vitamin D, sunlight and skin color. There are two forms of the vitamin molecule. The Vitamin D2 molecule is derived from ergosterol in the diet, whereas vitamin D3 molecule is derived from cholesterol via 7-dehydrocholesterol. Ultraviolet light (from sunlight) is responsible for the production of both forms of the vitamin.

Which is the active form of vitamin D?

The active form of the vitamin D molecule is calcitriol which is synthesized from either D2 or D3 in the kidneys. Calcitriol binds to a protein transcription factor which can regulated gene expression.

Structure Vitamin D 1: Mixture of molecular compounds of ergocalciferol with lumisterol, 1:1 Vitamin D 2: ergocalciferol (made from ergosterol) Vitamin D 3: cholecalciferol (made from 7-dehydrocholesterol in the skin). Vitamin D 4: 22-dihydroergocalciferol: Vitamin D 5: sitocalciferol (made from 7-dehydrositosterol)

Only a few foods, such as the flesh of fatty fish, naturally contain significant amounts of vitamin D. In the U.S. and other countries, cow’s milk and plant-derived milk substitutes are fortified with vitamin D, as are many breakfast cereals.