Skinceutical's antioxidants are made with patented technology and are known for their superior stability and the change of colour does not indicate a poor quality product. In fact Ferulic improves stability. Any product from clear to Amber is normal. It's a good idea to store them in cool dark place.

What color should my SkinCeuticals CE Ferulic be?

Question: What color should SkinCeuticals CE Ferulic be? Answer: SkinCeuticals CE Ferulic Serum can range in color from clear to pale yellow due to the active ingredients. Over time, it will turn to a deep yellow, orange or brown, which means the product is less effective and should soon be replaced.

Should vitamin C serum be clear or yellow?

Appearance. DO look at things like smell, color, and consistency of your vitamin C serum to make sure it hasn't oxidized. Color: Your serum should be white, clear, or a light champagne color. If the product is dark or cloudy in color, the serum may have oxidized and should be returned or gotten rid of.