C peptide is a biomarker for beta cell function. In other words, it's a measure of beta cell health and insulin production, and is critical to developing new disease modifying therapies for type 1 FDA Advisory No.2021 1312 Public Health Warning Against the Purchase and Use of the Non Compliant Cosmetic Product ALLWHITE PLACENTA HERBAL LIGHTENING SOAP CLASSIC Food and Drug Administration Peptides Houston TX ROG Medspa Glutathione Therapy in York & Hanover PA Body by Barker Glutathione (GSH) Peptide Abbexa Ltd