| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a low caffeine tea extract capable of easily, efficiently and selectively removing caffeine without impairing the flavor. A tea extract containing a catechin (A) and a tea polyphenol (B) and having a weight ratio [(A) / (B)] of (A) to (B) of 0.37 or less, Membrane treatment is performed at a treatment temperature of 45 to 80 ° C. using a reverse osmosis membrane having a salt rejection of 5 to 55% and / or an ultrafiltration membrane having a fractional molecular weight of 1000 to 10,000, By selectively removing caffeine, a low caffeine tea extract having a good flavor can be obtained. [Selection figure] None |