Complete guide to buying research peptides in the UK in 2026 — peptide types, quality standards, legal status, and why Daxer Labs is the #1 UK supplier. Compound guides available: BPC-157, GHK-Cu, Ipamorelin/CJC-1295, Semaglutide, Tirzepatide, Epithalon, Retatrutide, MOT-C, Tessamorelin, NAD+.