| vitamin B5 | Once used to describe biological activities now ascribed to pantothenic acid or nicotinic acid. (05 Mar 2000) |
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| vitamin B6 | <biochemistry> Member of the water soluble B vitamin group. Vitamin B6 or pyridoxine, is active in the metabolism of proteins, carbohydrates and fats. It is also a necessary part of haemoglobin synthesis. B6 deficiency results in retarded growth and a peripheral neuropathy. (27 Sep 1997) |
| vitamin B6 deficiency | Member of the water soluble B vitamin group. Vitamin B6 or pyridoxine, is active in the metabolism of proteins, carbohydrates and fats. It is also a necessary part of haemoglobin synthesis. B6 deficiency results in retarded growth and a peripheral neuropathy. (27 Sep 1997) |
| vitamin B6 unit | Potency expressed in terms of weight of pure crystalline pyridoxine. (05 Mar 2000) |
| vitamin B7 | <biochemistry> This vitamin is necessary for the synthesis of various enzymes and actsto reduce blood cholesterol. Adeficiency in this vitamin causes pellagra, which is characterised bydermatitis, diarrhoea, and inflammation of the mucous membranes. (09 Oct 1997) |
| vitamin Bc conjugase | <enzyme> An enzyme catalyzing the hydrolysis of the pteroylpolyglutamic acids to pteroylmonoglutamic acid, with consequent increase in vitamin activity; vitamin Bc is an obsolete term for folic acid. (05 Mar 2000) |
| vitamin b complex | <chemical> A group of water-soluble substances including thiamine, riboflavin, niacin (nicotinic acid), niacinamide (nicotinamide), the vitamin b6 group (including pyridoxine, pyridoxal, pyridoxamine), biotin, pantothenic acid, folic acid, possibly para-aminobenzoic acid, inositol, vitamin b12, and possibly choline. Chemical name: Vitamin B (12 Dec 1998) |
| vitamin BT | <biochemistry> _ Hydroxy _ trimethyl aminobutyric acid. Compound that transports long chain fatty acids across the inner mitochondrial membrane in the form of acyl carnitine. Sometimes referred to as Vitamin Bt or Vitamin B7. (18 Nov 1997) |
| vitamin Bx | A factor in the vitamin B complex, a part of all folic acids and required for its formation; neutralises the bacteriostatic effects of the sulfonamides since it furnishes an essential growth factor for bacteria, the utilization with which the sulfonamides interfere; used as an ultraviolet screen in lotions and creams. Synonym: paraaminobenzoic acid, vitamin Bx. Acronym: PABA (05 Mar 2000) |
| vitamin D | <biochemistry> The sunshine vitamin is produced by the body when exposed to UV light. Plays important role in calcium and phosphorus metabolism. Deficiency is known as rickets. Symptoms include soft (weak) and bendable bones, stunted growth, bow legs, chest deformities and knock-knees. (27 Sep 1997) |
| vitamin D2 | <hormone> The vitamin produced by the body when exposed to UV light. Plays important role in calcium and phosphorus metabolism. Deficiency is known as rickets. Symptoms include soft (weak) and bendable bones, stunted growth, bow legs, chest deformities and knock-knees. (27 Sep 1997) |
| vitamin D3 | <biochemistry> The vitamin produced by the body when exposed to ultraviolet light. It has an important role in calcium and phosphorus metabolism. Deficiency is known as rickets which presents with soft (weak) and bendable bones, stunted growth, bow legs, chest deformities and knock-knees. (15 Jan 1998) |
| vitamin d-binding protein | An alpha-globulin found in the plasma of man and other vertebrates. It is apparently synthesised in the liver and carries vitamin d and its metabolites through the circulation and mediates the response of tissue. It is also known as group-specific component (gc). Gc subtypes are used to determine specific phenotypes and gene frequencies. These data are employed in the classification of population groups, paternity investigations, and in forensic medicine. (12 Dec 1998) |
| vitamin D deficiency | A vitamin D deficiency disease of infancy or childhood with a disturbance of the normal process of ossification and bone growth. Often manifests with bone deformity. (27 Sep 1997) |
| vitamin D milk | Cow's milk to which vitamin D has been added, to contain 400 USP units of vitamin D per quart. (05 Mar 2000) |