| abstract |
The invention discloses a preparation method of a dark tea product, which comprises a dark tea pretreatment step and a tea product directional comprehensive extraction step. The invention can directionally and comprehensively extract the composition containing theabrownin, polysaccharide, amino acid, crude protein, potassium and calcium which has the core effect of reducing blood sugar in the dark tea to form the dark tea product, and simultaneously remove the substances such as caffeine, tea polyphenol and the like contained in the dark tea, so that the dark tea product achieves the characteristics of more stability, high efficiency, practicability and no side effect in the aspect of reducing blood sugar. |