“39 is not 40” is the vernacular of peptide-positive & coded response to Pharma wanting to hold patents longer & charge more for say, retatrutide. (If it’s 39 amino acids it’s a synthetic not a biologic & that = less $ for Lilly over time). If >40aa it’s $$$$ for much longer.
— Andrew D. Huberman, Ph.D. (@hubermanlab) May 21, 2026