Stable liquid mineral ascorbate compositions and methods of...

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A61K 31/375 (2006.01) A23L 1/302 (2006.01) A61K 9/08 (2006.01) A61K 31/34 (2006.01) A61K 47/22 (2006.01) A61K 47/26 (2006.01)

Patent

CA 2275420

Liquid vitamin C concentrate compositions comprise a mineral ascorbate and a pharmacologically acceptable liquid organic polyol solvent for the mineral ascorbate, the concentrate having a pH between about 5 and 7. The concentrate may also contain an aldonic compound and/or a pharmacologically acceptable zinc compound. The concentrate compositions are prepared by heating the solvent to 50-90°C and mixing the ascorbate and/or aldonic compound and'/or zinc compound into the heated solvent, preferably in the absence of oxygen. These concentrate compositions are also characterized as a composition which comprises the reaction product of a mineral ascorbate and a pharmacologically acceptable liquid organic polyol solvent and, optionally an aldonic compound and/or a soluble non-toxic zinc compound, which reaction product includes 4-hydroxy-5-methyl-3(2H)-furanone and/or 3-hydroxy kojic acid. Finished vitamin C products, characterized by excellent long term vitamin C stability, are conveniently prepared by incorporating the concentrates into finished cosmetic, medical and food products.

L'invention concerne des compositions de concentré de vitamine C liquides comprenant un ascorbate minéral et un solvant polyol organique liquide pharmacologiquement acceptable pour l'ascorbate minéral. Le concentré présente un pH compris entre 5 et 7. Le concentré peut également contenir un composé aldonique et/ou un composé de zinc pharmacologiquement acceptable. On prépare ces compositions de concentré en chauffant le solvant à 50-90 degrés C et un mélangeant l'ascorbate et/ou le composé aldonique et/ou le composé de zinc dans le solvant chauffé, de préférence en l'absence d'oxygène. Ces compositions de concentré sont en outre caractérisée en ce qu'elles contiennent le produit réactionnel d'un ascorbate minéral et d'un solvant polyol organique liquide pharmacologiquement acceptable et éventuellement un composé aldonique et/ou d'un composé de zinc non toxique soluble. Ce produit réactionnel comprend du 4-hydroxy-5-méthyl-3(2H)-furanone et/ou du 3-hydroxy acide kojique. Les produits finis de vitamine C sont caractérisés par une excellente stabilité à long terme de la vitamine C (fig. 5b), peuvent être préparés aisément par incorporation des concentrés dans des produits finis cosmétiques, médicaux ou alimentaires.

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