Dehydration is a well-established cause of headache and may occur with GLP-1 medications due to reduced fluid intake (from appetite suppression) or increased fluid loss (from gastrointestinal side effects such as nausea, vomiting, or diarrhoea)
Wu Q, Rayman MP, Lv H, Schomburg L, Cui B, Gao C et al (2015) Low Population Selenium Status Is Associated With Increased Prevalence of Thyroid Disease
When to Seek Medical Support and Personalized Dose Management Contact your healthcare provider if diarrhea persists beyond 12 weeks of stable dosing, occurs multiple times daily with severe urgency, causes dehydration (dark urine, dizziness, extreme thirst), or contains blood or mucus
The published certificates also run behind: the most recent BPC-157 documents are dated January 2026, the 10mg lot reports 98.9% purity against a certificate specification of above 98%, and that figure sits below the 99% threshold advertised elsewhere on the site