Low pH skin care composition and methods of using the same
Disclosed is an efficacious, low-pH skin care composition that provides good sensory properties and has a low skin irritation potential. The low-pH composition includes an effective amount of a vitamin B 3 compound and, optionally, one or more additional skin care actives to provide a skin health and/or appearance benefit. The low-pH composition also includes a pH buffer comprising lactic acid and sodium lactate, a polymer thickener comprising polyacrylate crosspolymer-6, and a silicone fluid having a kinematic viscosity of 100 cSt or less at 25° C. The pH of the low-pH composition can range from 2.0 to 5.0.
1 . A skin care essence comprising:
a) about 0.1% to 10% of a vitamin B3 compound;
b) about 0.1% to 5% of a pH buffer comprising lactic acid and/or sodium lactate;
c) about 0.1% to 5% of a polymer thickener comprising sodium polyacryloyldimethyl taurate;
d) about 0.1% to 10% of a low molecular weight silicone fluid;
wherein the skin care essence is substantially free of hydrocarbon oils;
wherein the composition comprises a pH of about 2.0 to about 5.0, an
opacity of about 60 to about 85, and a viscosity of about 1 cP to about 15,000 cP at 25° C.
2 . The skin care essence of claim 1 , wherein the silicone fluid comprises a kinematic viscosity of 100 cSt or less at 25° C.
3 . The skin care essence of claim 2 , wherein the silicone fluid is dimethicone.
4 . The skin care essence of claim 3 , further comprising a stable fatty alcohol thickener chosen from of cetyl alcohols, stearyl alcohols, behenyl alcohols, or mixtures thereof.
5 . The skin care essence of claim 1 , wherein the vitamin B 3 compound is selected from the group consisting of niacinamide, nicotinic acid, nicotinyl alcohol, and combinations thereof.
6 . The skin care essence of claim 4 , wherein the vitamin B 3 compound is niacinamide.
7 . The skin care essence of claim 1 , wherein the pH is about 2.5 to about 4.0.
8 . The skin care essence of claim 6 , wherein the pH is about 3.5 to about 3.9.
9 . The skin care essence of claim 1 , wherein the composition exhibits a TRPV1 activation of less than about 10% according to the TRPV1 assay.
10 . The skin care essence of claim 1 , wherein the wherein the pH of the composition remains below 5.0 for at least 5 minutes after application to human skin.
11 . The skin care composition of claim 1 , further comprising about 0.01% to about 1% of a silicone emulsifier.
12 . The skin care composition of claim 1 , wherein the polymer thickener further comprises polyacrylate crosspolymer-6.