Astaxanthin does not stain the skin. A few users may experience a slight yellow tint, which is normal. If you are concerned, you can reduce the amount of essence used. After applying the mask, use the ampoule essence in small, divided doses. Warm the essence in your palms before pressing it onto the skin—this helps Astaxanthin absorb better and minimizes the risk of yellowing. Once fully absorbed, your skin will appear hydrated, bright, and glowing.