Grapefruit Test Kit - Purity Test Kit for Grapefruit
Find Grapefruit purity test kits and reagent tests selected for fast substance identification and cleaner checking. Bergamottin and 6',7'-dihydroxybergamottin in grapefruit irreversibly inactivate intestinal CYP3A4 via mechanism-based covalent binding, reducing enzyme abundance by 50-70% after a single 200 ml serving. Full resynthesis takes 24-72 hours, meaning timing separation of grapefruit and medication does not prevent interactions. Parallel inhibition of intestinal P-glycoprotein raises systemic exposure to many substrates, while OATP1A2 blockade can paradoxically lower absorption of drugs like fexofenadine. Interaction magnitude varies with cultivar (white > ruby red), processing method, and individual CYP3A4 expression. Seville orange, tangelo and pomelo contain identical furanocoumarins and pose similar risks.
Drug purity testing kits come in 3 types: reagent tests, TLC and test strips. Use a multi-reagent kit to identify most common substances. Pair reagents with a TLC test kit to discover number and amount (%) of almost all ingredients. Use test strips to rule out fentanyl, nitazenes or xylazine.