Process for production of tea catechins selected from (-) epicatechin, (-) epigallocatechin, (-) epicatechin gallate and (-) epigallocatechin gallate comprising extracting tea leaves with hot water or an aqueous solution of methanol, ethanol or acetone, washing the extract containing solution with chloroform, transferring the washed solution into an organic solvent, removing the solution and passing the resulting solution through a reversed phase column in the presence of an eluting solution. Tea catechins and methods of using the same are also disclosed.
The effective ingredient in the inventive inhibitive agent against activity of a .alpha.-amylase is tea, e.g., black tea, or a tea polyphenol as a constituent of tea including epigallocatechin gallate, epicatechin gallate, epigallocatechin, epicatechin, (+)catechin and the isomer thereof, free theaflavin, theaflavin monogallates A and B and theaflavin digallate.
This invention discloses a new and unique combination of octopamine, yohimbine, bergenin and decaffeinated green tea extract useful as an oral supplement for increasing weight loss in humans.
Catechin complexes are obtained from aqueous extracts obtained from plants containing catechins. The extracts are concentrated to a liquor, and the liquor then is extracted with dichloromethane to eliminate pigments from the liquor and to obtain an aqueous phase, which contains catechin complexes, and a dichloromethane phase. The aqueous phase is mixed with purified sea sand to form a paste which is eluted with acetone to obtain the catechin complexes in the acetone. The catechin complexes are recovered from the acetone by evaporating the acetone, and the recovered catechin complexes may be dried to obtain a powder.
The present invention relates to processes for the treatment of liquors derived from oil-bearing fruit, for example from oil palm fruit, and to products therefrom. Typically a process involves removal of undissolved solids, oleaginous parts, colloids and higher weight molecules from the vegetation liquor to give an aqueous fraction containing phytochemicals, for example, flavonoids, phenolic acids and hydroxy acids. Subsequently, pH adjustment and solvent extraction upon said aqueous fraction realise an extract rich in hydroxy acids or phenolic acids or flavonoids or any combination thereof Applications of the substances subject of this invention are to be found in drinks, edible products, tonics, health supplements, antioxidant additives, cosmetics, soaps, shampoos, detergents, drugs or medicinal products.
A method of treating hypertension to reduce blood pressure or to maintain blood pressure at a desired level comprising administering to the patient an effective amount to maintain or lower blood pressure of tea polyphenols. The tea polyphenols include (-)-epigallocatechin gallate, free theaflavin, theaflavin monogallate A, theaflavin monogallate B and theaflavin digallate.
