Bobbi Brown makeup oxidizes on my skin within an hour, how can I prevent this?

Oxidation often happens when foundation reacts with the natural oils or pH of your skin or when exposed to air and heat, so starting with clean skin is essential — wash with a gentle cleanser and use a toner to balance pH before makeup.

Experts say a silicone-based or oil-absorbing primer helps create a barrier between your skin’s oils and the foundation, keeping the color more stable all day.

Bobbi Brown’s “Primer Plus Mattifier” is designed to control oil and shine, especially on t-zone areas, which reduces how much foundation darkens from excess sebum.

After applying foundation, set it with a translucent or “Sheer Finish Pressed Powder” so that the surface is sealed and less likely to oxidize.

Also check if your shade match might be slightly lighter than your true skin tone; foundation tends to darken so what seems perfect in-store may oxidize into a deeper tone once it settles.

Store your foundation away from heat and light and don’t forget to clean your brushes and sponges — makeup residue and oil on tools can speed up color changes.