| Universit de Louvain | GLP-1 receptor expression and botanical activation (2021) | View Study (PMID: 33820962) Written by: Nukleo Research Team | Based on peer-reviewed research | Last updated: March 26, 2026 What is GLP-1 Signaling
Acne : Persistent breakouts due to increased oil production
Serious side effects and warnings Liraglutide carries a Boxed Warning for thyroid C-cell tumors in rats and mice, but it is unknown whether liraglutide would cause this type of cancer in humans
Gastrointestinal (GI) side effects of retatrutide are similar to those of semaglutide and other GLP-1 medications
In a randomised, double-blind, placebo-controlled trial of a hydrolysed collagen and vitamin C supplement, trichoscopy showed a 27.6% increase in total hairs counted versus placebo but this did not reach statistical significance
Caffeine : Be cautious with caffeinated beverages, as caffeine may interfere with the absorption of glutathione