L- Cysteine

What is it?

 L- Cysteine ​​is an amino acid found in most protein-rich foods, such as chicken, turkey, yogurt, cheese, eggs, sunflower seeds, and legumes.
 It is the precursor molecule for Glutathione (GSH) in cells; it helps replenish adequate levels of this so-called Master Antioxidant in different organs, especially in the liver and lungs, where it reduces inflammation of the bronchial tubes and pulmonary tissue. It is equally related to fertility and brain health.


  • It is essential to form intracellular glutathione, an essential antioxidant for life.
  • Helps stabilize blood sugar by reducing fat cell inflammation.
  • NAC can be an effective aid for people with psychiatric disorders.
  • Helps reduce the risk of heart disease by preventing oxidative damage in general.
  • Supports detoxification to prevent and reduce brain, kidney, liver, and lung damage.
  • Contributes to reducing the consumption and cravings for nicotine within addictive behavior.
  • Improves dopamine function by reducing oxidative stress that is related to Parkinson's disease.
  • Helps improve fertility in men by improving semen integrity, as well as in women with polycystic syndrome (PCOS) by inducing or increasing the ovulation cycle.
  • Helps in brain health by regulating the levels of glutamic acid, an essential neurotransmitter in the brain that is linked to the neurological disorder of Alzheimer's disease.
  • Helps relieve symptoms of respiratory diseases such as COPD and bronchitis, can improve other lung and respiratory tract conditions such as cystic fibrosis, asthma, and pulmonary fibrosis.


Keswick C, Willoughby D. The antioxidant role of glutathione and N-acetyl-cysteine ​​supplements and exercise-induced oxidative

stress. J Int Soc Sports Nutr. 2005; 2 (2): 38-44. Published 2005 Dec 9. doi: 10.1186 / 1550-2783-2-2-38