I have been taking this for over a year now. It helped me stop smoking.
Life Extension Nac Supplement 1 Bottle $11.90
N-Acetyl-L-Cysteine Benefits:
* Promotes healthy cellular glutathione levels
* Provides powerful antioxidant support
* Supports immune system health
* Encourages liver health & function
* Promotes bronchial & respiratory health

https://www.healthlandcenter.com/products/life-extension-nac-supplement?pr_prod_strat=use_description&pr_rec_id=9c7f6d741&pr_rec_pid=7280478617766&pr_ref_pid=7280713171110&pr_seq=uniform
A potential treatment for substance use disorders.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993450/