N-acetylcysteine (NAC) is a supplement that has been available for several decades. People take it for various reasons, including to help treat medical issues ranging from psychological disorders to chronic lung conditions and to improve athletic performance.
The body needs 20 amino acids to maintain normal function. Of those, the body can make 11 by itself, which means a person does not need to eat in order to get them. L-cysteine is one of these amino acids. NAC is valued primarily for its role in antioxidant production.
Along with two other amino acids — glutamine and glycine — NAC is necessary to make and replenish glutathione.
Glutathione is one of your body’s most important antioxidants — compounds that help neutralize free radicals that can damage cells and tissues in your body.
It’s essential for immune health and for fighting cellular damage. Some researchers believe it may even contribute to longevity.
Its antioxidant properties be beneficial for numerous other ailments caused by oxidative stress, such as heart disease, infertility, and some mental health conditions (2Trusted Source).
Benefits of NAC (N-Acetyl Cysteine)
- Helps with detoxification to prevent or diminish kidney and liver damage;
- May improve mental health conditions and substance use disorder;
- Helps relieve symptoms of respiratory conditions;
- May improve fertility in both men and women.