Check three things: the packaging, the batch data, and the seller.Other things to look for are brand popularity, available of third-party testing of your THC vape pen. Also, buy from platforms that mention their verifiable legal address.
Packaging should include brand details, batch/lot code, and a scannable QR or link to a certificate of analysis (COA). Batch numbers on the box, cartridge, and COA must match. The COA should list cannabinoids and show contaminant testing.
Buy only from retailers with a UK address and customer support—avoid products with missing labels or unverifiable certificates.
