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Leaves from the Okinawa-grown tsubaki, or camellia japonica (a relative of camellia sinensis or tea), have a high level of an ellagic acid called Okicamelliaside (GOOGLE SEARCH). STUDY: Okicamelliaside, an extraordinarily potent anti-degranulation glucoside isolated from leaves of Camellia japonica (http://www.ncbi.nlm.nih.gov/pubmed/21150097, Download full article here) ABSTRACT: Guided by anti-degranulation assays, we isolated from leaves of Camellia japonica an ellagic acid glucoside named okicamelliaside. The structure was elucidated as 3,4-dioxoloellagic acid 4'-O-β-D-glucopyranoside by spectroscopic and chemical methods. Okicamelliaside was 12,000 times more potent than the antihistaminic drug, ketotifen fumarate, in inhibiting the degranulation of RBL-2H3 cells. Three other studies cataloged on Pubmed.gov Product Info Ingredients: 100% Okinawa-grown camellia japonica tea leaf Contents: 1.5g x 15 tea bags Storage: Store airtight in a cool, dry, dark location Producer: 1190 Chinen Aza Chinen, Nanjo-shi, Okinawa Prefecture, JAPAN Supplier Info Nakazen Corporation 1190 Chinen Aza Chinen, Nanjo-shi, Okinawa Prefecture, JAPAN Steeping Info Place one tea bag into a cup and pour 200 cc (6.8 fl oz) of hot water. Wait for about 1 minute and take out the tea bag. Tea is ready to be served! Enjoy second and third steep with the same tea bag.