| abstract |
The present invention relates to application of niacinamide, niacin, and niacin esters (nicotinic acid esters) derivatives of skin beneficial organic acids (henceforth called “derivatives”) for the synergistic treatment or prevention of topical disorders of skin such as acne, rosacea, skin wrinkles, age-spots, canker sores, striae distensae (stretch marks), pimples, and skin redness. These “derivatives” are made by a very simple in-situ method. These “derivatives” provide enhanced bioavailability of both ingredients that are combined to form such derivatives. The “derivatives” of present invention can be formulated in a wide variety of delivery systems including traditional water and oil emulsions, suspensions, colloids, solutions, or anhydrous systems. Niacin and certain niacin ester derivatives prepared by the in-situ method are free of flushing effect (a warm feeling in the skin usually associated with redness and itching) normally experienced with niacin and certain niacin esters themselves. |