Aqueous compositions with mangiferin for cosmetic applications

1. A cosmetic composition comprising:

a. mangiferin;

b. at least one hydrotrope selected from caffeine, vitamin B3 and combinations thereof;

c. at least one polymeric precipitation inhibitor selected from hydroxypropyl methylcellulose, hydroxypropyl cellulose, and combinations thereof;

d. at least one cyclodextrin selected from alpha-cyclodextrin, beta-cyclodextrin, gamma-cyclodextrin, hydroxypropyl-beta-cyclodextrin, hydroxypropyl-gamma-cyclodextrin, other cyclodextrin derivatives and combinations thereof; and

e. solvent;

wherein the cosmetic composition has a pH that is at or below pH 5 and wherein the cosmetic composition demonstrates stability against crystallization of mangiferin at 4° C. at a pH that is less than 5.

2. The composition of claim 1 , wherein the mangiferin is employed in an amount of from about 0.01 to about 5.0% by weight, based on the total weight of the composition.

3. The composition of claim 1 , wherein the at least one of at least one hydrotrope and at least one cyclodextrin is employed in an amount of from about 0.01 to about 25% by weight, based on the total weight of the composition.

4. The composition of claim 1 , wherein the polymeric precipitation inhibitor is employed in an amount of from about 0.01 to about 25% by weight, based on the total weight of the composition.

5. The composition of claim 1 , wherein the solvent is employed in an amount of from about 0 to about 90% by weight, based on the total weight of the composition.

6. The composition of claim 1 , wherein the vitamin B3 is selected from niacinamide, nicotinic acid, nicotinoyl alcohol; esters or salts thereof and combinations thereof.

7. The composition of claim 1 , wherein the solvent is selected from denatured alcohol, propylene glycol, water and combinations thereof.

8. The composition of claim 1 , further comprising one or more additional components selected from a humectant, antimicrobial, antioxidant, preservative, vitamin, vitamin derivative; and a filler, thickener, penetrant, fragrance, dispersant, film-forming agent; ceramide; opacifier and combinations thereof.

9. The composition of claim 8 , further comprising one or more components selected from acetamide MEA, glycol, glycerin, propylene glycol; alcohol; zinc pyrrolidone carboxylic acid, salicylic acid, alpha hydroxy acid; phenolic compounds, chalcones, flavones, flavanones, flavanols, flavonols, dihydroflavonols, isoflavonoids, neoflavonoids, catechins, anthocyanidins, tannins, lignans, aurones, stilbenoids, curcuminoids, alkylphenols, betacyanins, capsacinoids, hydroxybenzoketones, methoxyphenols, naphthoquinones, phenolic terpenes, resveratrol, curcumin, pinoresinol, ferulic acid, hydroxytyrosol, cinnamic acid, caffeic acid, p-coumaric acid, baicalin (Scutellaria Baicalensis root extract), pine bark extract (Pinus Pinaster bark/bud extract), ellagic acid; and vitamins, vitamin derivatives panthenol, ascorbic acid and combinations thereof.

10. An aqueous cosmetic composition comprising:

a. from about 0.01 to about 5.0 weight percent of mangiferin;

b. from about 0.01 to about 25 weight percent of at least one hydrotrope selected from caffeine, vitamin B3 and combinations thereof;

c. from about 0.01 to about 10 weight percent of at least one cyclodextrin selected from alpha-cyclodextrin, beta-cyclodextrin, gamma-cyclodextrin, hydroxypropyl-beta-cyclodextrin, hydroxypropyl-gamma-cyclodextrin, other cyclodextrin derivatives and combinations thereof;

d. from about 0.01 to about 25 weight percent of at least one polymeric precipitation inhibitor selected from hydroxypropyl methylcellulose, hydroxypropyl cellulose, and combinations thereof; and

e. from about 0 to about 90 weight percent of solvent;

wherein the cosmetic composition has a pH that is at or below pH 5 and wherein the cosmetic composition demonstrates stability against crystallization of mangiferin at 4° C. at a pH that is less than 5.

11. A method of preparing a cosmetic composition of claim 1 , comprising:

a. providing an isolate or extract comprising mangiferin up to 100% in purity mangiferin;

b. providing at least one hydrotrope selected from caffeine, vitamin B3 and combinations thereof, at least one cyclodextrin selected from alpha-cyclodextrin, beta-cyclodextrin, gamma-cyclodextrin, hydroxypropyl-beta-cyclodextrin, hydroxypropyl-gamma-cyclodextrin, other cyclodextrin derivatives and combinations thereof, and at least one polymeric precipitation inhibitor selected from hydroxypropyl methylcellulose, hydroxypropyl cellulose, and combinations thereof;

c. mixing the mangiferin, the at least one hydrotrope, and at least one solvent to form a mixture;

d. adding the at least one polymeric precipitation inhibitor to the mixture; and

e. adding the at least one cyclodextrin to the mixture.

12. A method of preparing a cosmetic composition according to claim 1 comprising:

a. providing an isolate or extract comprising mangiferin up to 100% in purity mangiferin;

b. providing at least one hydrotrope selected from caffeine, vitamin B3 and combinations thereof, at least one cyclodextrin selected from alpha-cyclodextrin, beta-cyclodextrin, gamma-cyclodextrin, hydroxypropyl-beta-cyclodextrin, hydroxypropyl-gamma-cyclodextrin, other cyclodextrin derivatives and combinations thereof, and at least one polymeric precipitation inhibitor selected from hydroxypropyl methylcellulose, hydroxypropyl cellulose, and combinations thereof;

c. mixing the mangiferin, the at least one hydrotrope, and at least one solvent to form a mixture;

d. adjusting the pH to above 7 to dissolve the mangiferin;

e. adding the at least one cyclodextrin to the mixture;

f. adjusting the pH to below 7; and

g. adding the at least one polymeric precipitation inhibitor to the mixture.

13. The cosmetic composition of claim 1 , wherein the at least one polymeric precipitation inhibitor is hydroxypropyl methylcellulose.

14. The cosmetic composition of claim 13 , wherein the composition demonstrates stability against crystallization of mangiferin at 4° C. at a pH that is less than 3.