biotin


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

biotin:

see vitaminvitamin,
group of organic substances that are required in the diet of humans and animals for normal growth, maintenance of life, and normal reproduction. Vitamins act as catalysts; very often either the vitamins themselves are coenzymes, or they form integral parts of coenzymes.
..... Click the link for more information.
; coenzymecoenzyme
, any one of a group of relatively small organic molecules required for the catalytic function of certain enzymes. A coenzyme may either be attached by covalent bonds to a particular enzyme or exist freely in solution, but in either case it participates intimately in
..... Click the link for more information.
.

Biotin

A vitamin, widespread in nature. It is only sparingly soluble in water; it is stable in boiling water solutions, but can be destroyed by oxidizing agents, acids, and alkalies. Under some conditions, it can be destroyed by oxidation in the presence of rancid fats. Biotin's occurrence in nature is so widespread that it is difficult to prepare a natural deficient diet. Biotin deficiency in animals is associated with dermatitis, loss of hair, muscle incoordination and paralysis, and reproductive disturbances. Biotin deficiency produced in humans by feeding large amounts of egg white resulted in dermatitis, nausea, depression, muscle pains, anemia, and a large increase in serum cholesterol. See Coenzyme

Biotin

 

(vitamin H), a water-soluble vitamin contained in yeasts and other microorganisms, and also in liver, egg yolk, kidneys, milk, cauliflower, and other vegetable products. The daily requirement of humans for biotin (0.25 mg) is usually provided by the microflora of the intestinal tract; it is therefore unnecessary to introduce it in the diet. Biotin has been obtained synthetically.

Avitaminosis H may be produced in laboratory animals by feeding large quantities of raw egg white, which contains a biotin antagonist, avidin, which decomposes when heated to 100° C. Affection of the skin of the seborrheic type is observed in avitaminosis H. Biotin is a coenzyme and participates in the transfer of carbon dioxide gas and its fixation in biosynthesis; its other functions have not been clarified.

biotin

[′bī·ə·tən]
(biochemistry)
C10H16N2O3S A colorless, crystalline vitamin of the vitamin B complex occurring widely in nature, mainly in bound form.

biotin

a vitamin of the B complex, abundant in egg yolk and liver, deficiency of which causes dermatitis and loss of hair. Formula: C10H16N2O3S
References in periodicals archive ?
The FDA is aware of people taking high levels of biotin that would interfere with lab tests.
Healthy subjects who take a single 1-mg or 100-mg oral dose of biotin have mean peak serum biotin concentrations of 8.
Also called vitamin H or B7, biotin is found in meagre amounts in several food items.
We're giving away our Biotin 5000 mcg supplements for free because we want more people to discover the benefits of Biotin for the body.
Even in large doses, biotin is considered nontoxic and is unlikely to cause any side effects.
The company's Biotin Plus product features 10 mg of lutein and 5,000 meg of biotin, helping to revive hair, strengthen nails and hydrate skin.
Skin, Hair & Nails and Biotin Plus are the newest additions to Natrol's growing suite of "inner beauty" products.
No good studies have ever shown that biotin strengthens nails or prevents hair loss.
The production of either glutamic acid or lysine, it was profoundly affected by the concentration of biotin [23].
Overseas, Viviscal is the most popular brand of biotin supplements, favored by models and actresses.
Results obtained from cellular sorption showed that the presence of biotin decreases the amount of living cancerous cells due to the increase in taking of drug carrier by cancerous cells.
Veterinarians first noted the value of biotin when they saw that it helped heal brittle hooves in horses.