If your Vitamin C product has changed color, throw it away. Seriously, throw it away.
Vitamin C in its various forms is one the trickiest in terms of keeping it stable and effective in a skincare formulation. Once it's changed color or oxidized its chemical composition has changed and it's no longer effective as an antioxidant. At best, it does nothing. At worst, it can actually work as an irritant, and even cause blackheads.
Shamefully, some companies still refer to this color change as normal, but it's not. Look for a dark or frosted bottle, and a pump or airless pump in terms of packaging. (Skip jars and droppers for this tricky ingredient.)
If you're looking for a great Vitamin C serum, Triple C&E has been one of my best-sellers for years! Creamy white, stable and effective down to the last drop.
