The invention discloses an oolong tea extract with multi-target
sugar-controlling and lipid-lowering activity as well as a preparation method and application of the oolong tea extract. The oolong tea extract is extracted and prepared by adopting an enzymolysis-
physical field assisted
combined method; the preparation method comprises the following steps: crushing, sieving, carrying out enzymolysis on
cellulase and
pectinase, extracting at medium temperature, deactivating
enzyme, cooling, shearing at high speed, homogenizing at
high pressure, centrifuging, taking supernatant, carrying out suction
filtration, concentrating and freeze-
drying. The preparation process is simple, compared with a traditional
water extraction method, the sample yield and the extraction efficiency of tea
polyphenol and tea
polysaccharide can be improved at the same time, the total
phenol content of the prepared extract is larger than or equal to 33%, the total
sugar content is larger than or equal to 20%, and the yield is larger than or equal to 35%. The
tea leaf extract has the capacity of inhibiting alpha-
glucosidase, alpha-
amylase,
pancrelipase and
cholesterol esterase and the capacity of cholate adsorption and
cholesterol micelle dissolution inhibition at the same time, and can be applied to food and health care products.