Our Grapefruit Seed Extract is made from a high-proanthocyanadin content. Quality assured. Grapefruit seed extract (GSE) contains mainly polyphenolic compounds including quercetin hesperidin campherol glycoside neohesperidin naringin apigenin rutinoside poncirin etc. The polyphenols themselves are unstable but are chemically converted into more stable substances that belong to a diverse class of products called quaternary ammonium compounds. Some quaternary compounds—benzethonium chloride and benzalkonium chloride for example—are used industrially as antimicrobials but are toxic to animal life; hence we don’t find them in detectable amounts in our GSE. The B vitamin choline is also a quaternary compound but is nontoxic and even essential for maintaining healthy neurologi…
