NAC

Fluidize bronchial secretions

The clinical use of NAC developed as a mucolytic in the early 1960s. The objective was to make certain secretions less viscous to facilitate their evacuation. This first use was based on a precise chemical property of the molecule, very different from the general promise of a supplement intended to improve energy or protect the body on a daily basis.

An important role in poisoning

Paracetamol poisoning then gave NAC a major place in toxicology. Research has linked liver toxicity to a reactive metabolite and glutathione depletion. Treatments developed in the 1970s made it possible to limit lesions, particularly when they were administered quickly. Even today, this is urgent medical care, with specific protocols.

Expand searches without confusing uses

Its link to glutathione and glutamate regulation subsequently encouraged research in psychiatry, cognition and sport. Some observations are promising, other trials have not found any benefit. This story explains both the scientific interest of NAC and the need to judge each use separately: a drug effective in one situation does not automatically become a useful complement in all others.