Diabetes 69 , 20862093 (2020)
Compounded GLP-1s have not been evaluated by the FDA, but side effects are expected to be similar to other GLP-1-based medications reviewed by the FDA, which have the following side effects: nausea, diarrhea, vomiting, constipation, abdominal (stomach) pain, headache, fatigue, dyspepsia (indigestion), dizziness, abdominal distension, eructation (belching), hypoglycemia (low blood sugar), flatulence (gas buildup), gastroenteritis (an intestinal infection), and gastroesophageal reflux disease (a type of digestive disorder)
Some people use vitamin C in the morning and copper peptides at night to reduce irritation, since layering many actives can sting on reactive skin
Nature Reviews Cancer (2008) 9