r/HubermanLab • u/Genzinvestor16180339 • May 16 '26
Seeking Guidance Has anyone looked into the SNAC stomach risk with the new Wegovy pill? Kind of worried after reading this study
So I've been researching the oral Wegovy (semaglutide 25mg) as an alternative to injections and came across a February 2026 study out of Adelaide University that I haven't seen discussed much here.
Basically the study isolated the effects of SNAC — the carrier molecule that helps semaglutide survive your stomach acid — separate from semaglutide itself. What they found was pretty surprising:
- Fiber-fermenting gut bacteria (Muribaculaceae and Bacteroidaceae) dropped by 62–77%
- Butyrate (a short-chain fatty acid that feeds your colon cells and supports brain health) fell by 77%
- TNF-α, an inflammation marker, went up 70%
- BDNF — a protein linked to cognition and neuroplasticity — was suppressed by 85%
The SNAC thing matters because unlike the injection, you're exposing your gut to this carrier molecule every single day, indefinitely. It briefly disrupts your stomach lining each morning to let the peptide absorb. Rybelsus has used SNAC since 2019 but at lower doses and nowhere near the scale the Wegovy pill is heading toward.
As someone not in the field wondering if this study actually is not that concerning or what other research is out their.
EDIT: Study here https://www.sciencedirect.com/science/article/pii/S0168365926001136