Ads
related to: niacin amino acids
Search results
Results From The WOW.Com Content Network
Both the DRI and DRV describe amounts needed as niacin equivalents (NE), calculated as 1 mg NE = 1 mg niacin or 60 mg of the essential amino acid tryptophan. This is because the amino acid is utilized to synthesize the vitamin. [6] [22] For U.S. food and dietary supplement labeling purposes the amount in a serving is expressed as a percent of ...
Niacin (the nutrient) can be manufactured by plants and animals from the amino acid tryptophan. [5] Niacin is obtained in the diet from a variety of whole and processed foods, with highest contents in fortified packaged foods, meat, poultry, red fish such as tuna and salmon, lesser amounts in nuts, legumes and seeds.
Niacin, also called nicotinic acid, is found in most organisms. Via metabolism, it becomes nicotinamide adenine dinucleotide NAD, a coenzyme which is involved in oxidation and reduction in metabolic cells. A deficiency of niacin leads to a disease called pellagra. Pyridoxine or vitamin B6, it becomes a major compound in the metabolism of amino ...
Tryptophan is also a precursor to the neurotransmitter serotonin, the hormone melatonin, and vitamin B 3 (niacin). [4] It is encoded by the codon UGG. Like other amino acids, tryptophan is a zwitterion at physiological pH where the amino group is protonated (– NH + 3; pK a = 9.39) and the carboxylic acid is deprotonated ( –COO −; pK a = 2 ...
A coenzyme in the catabolism of sugars and amino acids. Vitamin B 2: Riboflavin: A precursor of coenzymes called FAD and FMN, which are needed for flavoprotein enzyme reactions, including activation of other vitamins Vitamin B 3: Niacin (nicotinic acid) A precursor of coenzymes called NAD and NADP, which are needed in many metabolic processes ...
Humans can produce some vitamins from precursors they consume: for example, vitamin A is synthesized from beta carotene; and niacin is synthesized from the amino acid tryptophan. [54] Vitamin C can be synthesized by some species but not by others. Vitamin B 12 is the only vitamin or nutrient not available from plant sources.