L-cysteine – activity, properties, sources

L-cysteine ​​in the form of a dietary supplement is consumed in inflammatory diseases, allergies, acne, to improve the condition of the skin and hair.

L-cysteine ​​is an amino acid that has many different functions in the body, and the most important are building strong antioxidant glutathione and hair, nail and skin proteins – keratin.Noteworthy are the other properties of L-cysteine ​​confirmed by research – it may be helpful, among others,in inflammatory diseases, infertility in men, allergies, bronchitis, problems of the immune system.It also has a cleansing effect on the body.L-cysteine ​​can be found in food and in the form of a supplement.

L-Cysteine 500mg

L-cysteine ​​is a protein substance – an amino acid belonging to the endogenous group, that is, produced by the human body.It is formed from methionine and serine in the presence of folic acid, vitamin B6 and vitamin B12.Sometimes it is classified as conditionally necessary amino acids, because not enough L-cysteine ​​is produced in the body.This applies especially to children, the elderly and people with deficiencies of B group vitamins. L-cysteine ​​is found in many proteins, but in small amounts (usually no more than 2% of all amino acids).It has a thiol group in its structure with a sulfur atom, thanks to which it has antioxidant properties.It is necessary for the production of proteins, detoxification of the body, builds tissues and hormones and participates in many metabolic processes.It builds keratin – a protein of hair, nails and skin, as well as collagen, which provides skin elasticity and health of joint cartilage.The most important function of L-cysteine ​​is to build glutathione – a very strong antioxidant necessary for health and proper functioning of the body.The content of glutathione in cells may be a prognosis of life span.As a food supplement it is sold in the form of N-acetyl-L-cysteine ​​(NAC).

L-cysteine ​​has antioxidant properties

L-cysteine ​​has the ability to fight free radicals and oxidative stress.Thanks to this, it protects the body’s cells from damage, slows down the aging process and helps to protect against many diseases, includingdementia, rheumatoid arthritis and atherosclerosis.By protecting cell membranes and nerve endings, it prevents neurodegenerative diseases such as Parkinson’s disease.


L-cysteine ​​improves immunity

By increasing the level of glutathione, L-cysteine ​​supports the immune system and affects the activity of white blood cells.Studies show that NAC supplementation improves immune function in people with HIV.Short-term NAC supplementation (from 2 to 4 months) strengthens immunity and reduces the incidence of infections among postmenopausal women.


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