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Description
NAC Prescriptions and Supplements As a nebulized medication, your doctor may prescribe a 10% or 20% solution of Acetylcysteine to be used 3-4 times daily

Moreover, knockdown of a PGN sensing receptor, PGN-recognition protein 2, resulted in an increase in sociability in mice, indicating that loss of the ability to sense peptidoglycan results in host behavioral changes 101
[DOI] [PubMed] [Google Scholar] 145.Okada S, York DA, Bray GA, Erlanson-Albertsson C

I think the easiest way is to take a collagen protein powder