Water-soluble extract from olives
The invention provides olive-derived vegetation water substantially free of monophenolic compounds (e.g., tyrosol and its derivatives) from olive pits. According to one aspect of the invention, the pits or seeds are removed from the olives prior to pressing. The pitless pulp or meat is then pressed to obtain a liquid-phase mixture including olive oil, vegetation water, and solid by-products. The vegetation water is separated from the rest of the liquid-phase mixture and collected. The vegetation water is useful as a source of oleuropein.
1. A method of producing vegetation water from olives, said vegetation water containing oleuropein substantially free of monophenolic compounds from olive pits, comprising
separating olive pits from olives to obtain a pitless olive pulp;
pressing the pitless olive pulp to obtain a liquid-phase mixture including water, oil, and olive pulp components;
separating the water component from the oil and olive pulp components of the liquid-phase mixture to obtain a water component substantially free of oil and olive pulp;
collecting the separated water component.
2. The method of claim 1 , further comprising removing moisture from the water component to obtain an increased concentration of oleuropein.
3. The method of claim 1 , further comprising drying the separated water component to obtain a powder containing oleuropein.
4. The method of claim 3 , further comprising encapsulating the powder containing oleuropein into a gelatin capsule.
5. A composition prepared according to the method of claim 3 which comprises oleuropein substantially free of monophenolic compounds from olive pits.
6. A method for obtaining oleuropein from olives, substantially free of monophenolic compounds from olive pits, which comprises
separating olive pits from olives to obtain a pitless olive pulp;
extracting the pitless olive pulp with an aqueous or aqueous-alcoholic solvent to produce a crude mixture of polyphenolic compounds in the extract;
removing the solvent from the extract.
7. The method of claim 6 further comprising chromatographing the extract on a column; and
collecting fractions from the column, which contain oleuropein.
8. A dietary supplement, comprising
extract of olives containing oleuropein substantially free of monophenolic compounds from olive pits.
9. The dietary supplement of claim 8 , wherein said extract is an aqueous or aqueous-alcoholic extract.
10. The dietary supplement of claim 9 , wherein said extract has a reduced moisture content to provide a concentrated liquid.
11. The dietary supplement of claim 9 , wherein said extract is dried to provide a powder.
12. The dietary supplement of claim 11 , wherein said extract is in the form of a tablet, capsule, pill, or confection food additive.