Definitions for vitamin d
vi·tamin d

Princeton's WordNetRate this definition:5.0 / 1 vote

1. vitamin D, calciferol, viosterol, ergocalciferol, cholecalciferol, Dnoun

   a fat-soluble vitamin that prevents rickets

WiktionaryRate this definition:0.0 / 0 votes

1. vitamin Dnoun

   Either of a number of fat-soluble vitamins, required for normal bone development and that prevents rickets; can be manufactured in the skin on exposure to sunlight.

WikipediaRate this definition:0.0 / 0 votes

1. Vitamin D

   Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects. In humans, the most important compounds in this group are vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).The major natural source of the vitamin is synthesis of cholecalciferol in the lower layers of epidermis of the skin through a chemical reaction that is dependent on sun exposure (specifically UVB radiation). Cholecalciferol and ergocalciferol can be ingested from the diet and supplements. 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. Mushrooms exposed to ultraviolet light contribute useful amounts of vitamin D2. Dietary recommendations typically assume that all of a person's vitamin D is taken by mouth, because sun exposure in the population is variable and recommendations about the amount of sun exposure that is safe are uncertain in view of the skin cancer risk.Vitamin D from the diet, or from skin synthesis, is biologically inactive. It is activated by two protein enzyme hydroxylation steps, the first in the liver and the second in the kidneys. Because vitamin D can be synthesized in adequate amounts by most mammals if they get enough sunlight, it is not essential and therefore is technically not a vitamin. Instead it can be considered a hormone, with activation of the vitamin D pro-hormone resulting in the active form, calcitriol, which then produces effects via a nuclear receptor in multiple locations.Cholecalciferol is converted in the liver to calcifediol (25-hydroxycholecalciferol); ergocalciferol is converted to 25-hydroxyergocalciferol. These two vitamin D metabolites (called 25-hydroxyvitamin D or 25(OH)D) are measured in serum to determine a person's vitamin D status. Calcifediol is further hydroxylated by the kidneys and some of the immune system cells to form calcitriol (1,25-dihydroxycholecalciferol), the biologically active form of vitamin D. Calcitriol circulates as a hormone in the blood, having a major role regulating the concentration of calcium and phosphate, and promoting the healthy growth and remodeling of bone. Calcitriol also has other effects, including some on cell growth, neuromuscular and immune functions, and reduction of inflammation.Vitamin D has a significant role in calcium homeostasis and metabolism. Its discovery was due to effort to find the dietary substance lacking in children with rickets (the childhood form of osteomalacia). Vitamin D supplements are given to treat or to prevent osteomalacia and rickets. The evidence for other health effects of vitamin D supplementation in vitamin D-replete individuals is inconsistent. The effect of vitamin D supplementation on mortality is not clear, with one meta-analysis finding a small decrease in mortality in elderly people. Except for the prevention of rickets and osteomalacia in high-risk groups, any benefit of vitamin D supplements to musculoskeletal or general health may be small.

ChatGPTRate this definition:0.0 / 0 votes

1. vitamin D

   Vitamin D is a fat-soluble vitamin that is essential for maintaining normal levels of calcium and phosphate in the body. It plays a crucial role in bone health, immune system function, and cell division. It is unique among vitamins in that the body can produce it when the skin is exposed to sunlight. Vitamin D can also be obtained through diet and supplements. In its active form (known as calcitriol), vitamin D acts as a hormone to regulate calcium absorption in the gut and maintain adequate serum calcium levels to enable normal mineralization of bone.

WikidataRate this definition:0.0 / 0 votes

1. Vitamin D

   Vitamin D is a group of fat-soluble secosteroids responsible for intestinal absorption of calcium and phosphate. In humans, the most important related compounds of vitamin D are vitamin D2 and vitamin D3. Cholecalciferol and ergocalciferol are unique as they constitute what is known as vitamin D and can be ingested from the diet and/or supplements. The body can also synthesize vitamin D when sun exposure is adequate. Although vitamin D is commonly called a vitamin, it is not actually an essential dietary vitamin in the strict sense, as it can be synthesized in adequate amounts by most mammals exposed to sunlight. An organic chemical compound is only scientifically called a vitamin when it cannot be synthesized in sufficient quantities by an organism, and must be obtained from its diet. However, as with other compounds commonly called vitamins, vitamin D was discovered in an effort to find the dietary substance lacking in a disease, namely, rickets, the childhood form of osteomalacia. Additionally, like other compounds called vitamins, in the developed world, vitamin D is added to staple foods, such as milk, to avoid disease due to deficiency.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Vitamin D

   A vitamin that includes both CHOLECALCIFEROLS and ERGOCALCIFEROLS, which have the common effect of preventing or curing RICKETS in animals. It can also be viewed as a hormone since it can be formed in SKIN by action of ULTRAVIOLET RAYS upon the precursors, 7-dehydrocholesterol and ERGOSTEROL, and acts on VITAMIN D RECEPTORS to regulate CALCIUM in opposition to PARATHYROID HORMONE.

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1. vitamin d

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2. vitamin d

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Matched Categories

1. • Fat-soluble Vitamin

How to pronounce vitamin d?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say vitamin d in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of vitamin d in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of vitamin d in Pythagorean Numerology is: 2

Examples of vitamin d in a Sentence

1. Alison Tedstone:

   To protect their bone and muscle health, they should consider taking a daily supplement containing 10 micrograms of vitamin D, with the nation staying in to save lives and protect the NHS, many people are spending more time indoors and may not get all the vitamin D they need from sunlight.

2. Kaleigh McMordie:

   Salmon and other fatty fish are high in both omega-3 fatty acids and vitamin D, both of which can improve sleep quality by promoting serotonin production. In one study, men who ate salmon three times a week fell asleep faster and reported better daily functioning than those who ate chicken, beef, or pork.

3. Vickie Kloeris:

   A crew member can obtain their nutritional requirements from our food system, and they are allowed to supplement if they desire to do so. The only supplement we provide is Vitamin D because they don’t have sunlight exposure.

4. Adam Friedman:

   You need very little time [ to synthesize vitamin D in skin ] but it's hard to standardize that, depending what time of day it is, where you are in the world and UV index changes, we can't say,' after three minutes and 30 seconds, you'll get exactly enough D and be safe.'.

5. Robert Heaney:

   Deficiency in vitamin D inhibits these processes, causing the cellular systems to break down, and leading to chronic disease.

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=vitamin d
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Vitamin_D
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Vitamin_D
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=vitamin d