N-acetylcysteine, or NAC, is derived from cysteine, a semi-essential amino acid, which implies that our bodies produce some of what we require, and some come from food. NAC disintegrates into cysteine after being consumed, and cysteine is then transformed into glutathione.

Following are some health advantages of NAC that are mainly brought about by an increase in glutathione levels in the body

• Acetaminophen (Tylenol) poisoning
• Atelectasis
• Lung diseases
• Infections
• Heart diseases
• Angina or chest pain
• Hyperhomocysteinemia

Before taking NAC supplements, those with any of the following conditions need to use caution and consult a doctor

• Pregnant women – There is no proof that it damages the developing infant even though it crosses the placenta. But one should only use N-acetyl cysteine if the doctor recommends it.
• Breastfeeding mothers – N-acetyl cysteine use is not currently known to be safe in breast feeding mothers as there is not enough information.
• Children – should not be given NAC unless recommended to do so by a doctor.
• Allergy – People allergic to NAC shouldn’t take it because it could make them sick.
• Asthma – When taking NAC for asthma, exercise caution unless under a doctor’s care. When breathed or administered orally, NAC may cause bronchospasm.

Dietary sources of cysteine

The body can transform NAC into L-cysteine. As an alternative, humans can get L-cysteine from high-protein diets in the following ways

• Animal source – Eggs, meat like chicken and beef.
• Fish – Salmon.
• Dairy products like cottage cheese.
• Nuts and whole grains.