N-Acetylcysteine (NAC) is generally considered safe for long-term use when taken at appropriate doses. However, it is advisable to consult with a healthcare professional to determine the proper dosage and duration of NAC supplementation based on your specific health needs and any potential interactions with other medications or conditions you may have.

L-cysteine is one of the amino acids to contain sulphur. NAC has a strong sulphur like odour, which is entirely normal.

Yes, N-Acetylcysteine (NAC) has been studied for its potential benefits on lung and respiratory health. It is commonly used as a mucolytic agent to help break down and thin mucus. Additionally, NAC has antioxidant and anti-inflammatory properties, which may help protect lung tissue and support overall respiratory function.