The rule for how to layer skincare products in the right order is texture: thinnest first, thickest last, water-based before oil-based, sunscreen always last in the morning. If you only remember that sentence you will get the order right most of the time without...
The short version of vitamin C vs retinol is that they are usually handled as two different jobs at two different times of day. Vitamin C is an antioxidant category that most formulations place in the morning routine. Retinol is a vitamin A derivative that almost...