SNAC (oral semaglutide absorption enhancer)
How GLP-1 receptor agonists work — receptors, gastric emptying, and the satiety pathway.
Definition
Sodium N-(8-[2-hydroxybenzoyl] amino) caprylate — the absorption enhancer co-formulated with oral semaglutide (Rybelsus). SNAC transiently increases gastric pH and disrupts the cell membrane just enough to let semaglutide cross into the bloodstream — without SNAC, oral semaglutide bioavailability would be effectively zero. The reason Rybelsus requires a strict 30-minute fast before and after dosing: food disrupts SNAC-semaglutide complex formation. Foundayo (orforglipron) is a non-peptide molecule and doesn't need SNAC, eliminating the food restriction.
Definition curated by Weight Loss Rankings — sourced from FDA labels and peer-reviewed PubMed literature, never AI-generated summaries.
Related terms in Mechanism
- GLP-1 receptor
- GIP receptor
- Dual agonist
- Gastric emptying
- Food noise
- Triple agonist
- Amylin
- GLP-1 tachyphylaxis
- Non-peptide GLP-1 agonist
- A1C (glycated hemoglobin)
- MASH / MASLD
- TBWL (Total Body Weight Loss)
- C-peptide
- eGFR (estimated glomerular filtration rate)
- Visceral adipose tissue (VAT)
- AHI (apnea-hypopnea index)
Looking for more depth?
- Oral GLP-1 Q&A hub
- Browse the full GLP-1 glossary (124 terms across 8 categories)
- Research articles — primary-source deep dives
- Tools and calculators
- Compare GLP-1 telehealth providers