n-acetylcysteine or glutathione Chemical formula of and its conversion to Glycine and N-acetylcysteine (NAC) are

Form Pros Cons Best For Injectable Highest bioavailability, fast effects Requires reconstitution, needles Serious injuries, research Oral Capsules Convenient, gut health support Lower absorption Leaky gut, general wellness Nasal Spray Easy to use, systemic effects Variable dosing Cognitive & systemic benefits (Note: Injectable is most effective for tissue repair, while oral works best for gut healing.) Is BPC-157 Legal in the USA

3. How long does it take to see results

DOI: 10.3390/biom11081120

Anyone on other medications, or with a chronic condition, should consult a licensed clinician before considering any research peptide