Oral Bioavailability Is the Whole Story
Unmodified peptides absorb at well under 1% orally. The FDA-approved oral semaglutide product (Rybelsus) pairs the molecule with a proprietary absorption-enhancing excipient and a rigid administration protocol to reach a therapeutic dose. Compounded oral formulations vary by pharmacy and do not always replicate that exact excipient system, which means absorption — and therefore effect — can be less predictable than with the injectable form. Your physician will set expectations accordingly and monitor your response rather than assuming dose-for-dose equivalence.