Manufacturing method for low caffeine 'Benifuki', 'Banihomare' green tea remaining the contents of anti-allergic compounds [Japanese]

摘要

The manufacturing method for low caffeine green tea remaining the contents of epigallocatechin-3-O-(3-O-mehtyl) gallate (EGCG3"Me) and strictinin, that have been observed anti-allergic actions, were investigated using 'Benifuki' tea leaves in the first crop and 'Benihomare' tea leaves in the second crop season. Under the condition of steeping picked tea leaves in water over 85degreesC for 90, 90degreesC for 60 or 95degreesC for 60, caffeine content was reduced by half, while the contents of EGCG3"Me, strictinin, catechins and amino acids were maintained in the processed tea leaves. From quality of appearance, it was supposed that the manufacturing green tea was good after soaking in water at 90degreesC for 60 and spin-drying, to reduce caffeine content.