ANTIOXIDANT EXTRACT FROM FRUIT SKINS
The application generally relates to methods of inhibition of oxidation of polyunsaturated fatty acid—(PUFA) and/or lipid-containing foods and nutraceutical products. The application provides natural and consumer friendly method for preventing the oxidation or rancidity development of PUFA and/or lipids by incorporation of apple skin extracts as natural antioxidant in emulsions, bulk oil or other form of food and nutraceutical products.
1 . A method of preventing or inhibiting the oxidation of polyunsaturated fatty acids and/or lipids comprising contacting the polyunsaturated fatty acids and/or lipids with an effective amount of an extract comprising phenolic compounds from apple skins.
2 . The method according to claim 1 , wherein the effective amount of the extract comprising phenolic compounds from apple skins is an amount to provide about 1 ppm to about 20,000 ppm of total phenolics in a product comprising the polyunsaturated fatty acids (PUFA) and/or lipids.
3 . The method according to claim 1 wherein the extract comprising phenolic compounds has been treated under conditions to remove sugar compounds.
4 . The method according to claim 1 , wherein the extract comprising phenolic compounds has been treated under conditions to remove lipids, carontenoids, chlorophylls and/or proanthocyanidins.
5 . The method according to claim 1 , wherein the polyunsaturated fatty acids and/or lipids are comprised in any nutraceutical (natural health product) or cosmetic product containing polyunsaturated fatty acids and/or lipids.
6 . (canceled)
7 . (canceled)
8 . The method according to claim 1 , wherein the phenolic compounds are extracted from the apple skins using a food-grade solvent.
9 . (canceled)
10 . The method according to claim 1 , wherein the extract further comprises food-grade carrier.
11 . (canceled)
12 . A process for extracting apple phenolic compounds from apples, comprising:
(a) obtaining a sample of apple peels,
(b) optionally dehydrating the peels and converting the peels into a powder;
(c) extracting the peels with a food-grade solvent under conditions to extract the apple phenolic compounds into the solvent; and
(d) removing solids from the extract of (c) to provide a stock solution of apple phenolic compounds.
13 . (canceled)
14 . (canceled)
15 . The process according to claim 12 , wherein the conditions to extract the apple phenolic compounds into the solvent comprise sonicating for about 5 minutes to 2 hours.
16 . (canceled)
17 . The process according to claim 12 , wherein the stock solution of extracted apple phenolic compounds is reduced to dryness to provide a solid concentrate of apple phenolic compounds.
18 . The process according to claim 17 , wherein the solid concentrate is taken up into water to provide an aqueous solution having insoluble suspended material and this insoluble material is removed to provide a clear aqueous solution of extracted apple phenolic compounds.
19 . The process according to claim 12 , further comprising removing proanthocyanidins, lipids, carontenoids and/or chlorophylls from the peels by extracting the peels with hexane and/or by extracting the peels with a mixture of acetone, water and acetic acid.
20 . The process according to claim 19 , wherein the stock solution of apple phenolic compounds is reduced to dryness to provide a solid concentrate of extracted apple phenolic compounds.
21 . The process according to claim 20 , wherein the solid concentrate is further taken up into water to provide an aqueous solution having insoluble suspended material and this insoluble material is removed to provide a clear aqueous solution of extracted apple phenolic compounds.
22 . The process according to claim 21 , wherein the stock solution of extracted apple phenolic compounds, the solid concentrate of extracted apple phenolic compounds or the aqueous solution of extracted apple phenolic compounds is treated to remove sugar compounds.
23 . The process according to claim 22 , wherein a food-grade carrier is added to the stock solution of extracted apple phenolic compounds, the solid concentrate of extracted apple phenolic compounds or the aqueous solution of extracted apple phenolic compounds or the sugar removed versions thereof.
24 . (canceled)
25 . A animal or human food product comprising an extract of phenolic compounds from apples, wherein the extract is prepared using the process according of claim 12 .
26 . The food product according to claim 25 , wherein the product is in the form of emulsions, oils, liquids, solids, creams, or a microencapsulated product.
27 . The food product according to claim 26 in the form of an oil in water emulsion or a bulk oil.
28 . The food product according to claim 27 , wherein the bulk oil is fish oil.