L-Lysine HCl

About L-Lysine HCl

L-lysine is classified as an essential amino acid for humans and must be supplied in the diet. The male adult’s daily requirement is 12 mg per kg of body weight. It is extremely rare for a diet to contain insufficient quantities of lysine. Vegetarians who follow a macrobiotic diet and athletes who exercise vigorously on a frequent basis must take care to obtain sufficient L-lysine. Beans, peas and lentils are the best source of lysine.


The most predominant benefit of L-lysine is for treatment of mouth and genital lesions caused by herpes simplex virus, as well as shingles caused by herpes zoster viruses. Taking L-lysine can speed recovery time and reduce the chance of recurrent breakouts of herpes infection. It’s important to note that the effects of taking L-lysine on a regular, long-term basis are not known. Good results can be seen by initiating supplementation during the beginning phases of a herpes simplex episode.Lysine is also used as a neutralizer for analgesic antipyretics such as acetylsalicylic acid and ibuprofen and for the synthesis of antihypertensive agents. Other uses include parenteral and enteral nutrition and as a component of sports nutrition products.


L-lysine is manufactured by fermentation from carbohydrate sources. L-lysine monohydrochloride is obtained by neutralizing with hydrochloric acid. Ajinomoto manufactures L-lysine under cGMP conditions. All raw materials are 100% free of materials of animal origin. A Drug Master File for L-lysine HCl is on file at the FDA. L-lysine HCl meets USP, EP and JP standards.


Abbreviation: L-Lys HCl
CAS Number: 657-27-2
Conforms To: JP,USP,EP
Chemical Name: (2S)-2, 6-Diaminohexanoic Acid Monohydrochloride
Chemical Formula: C6H14N2O2·HCl
Molecular Weight: 182.6500
Nitrogen Content: 0.1534
Assay: 98.5 to 101.0%
Solubility: Freely soluble in water
Description: White powder; slightly characteristic taste

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