Vitamin C serum is best used in the morning after cleansing and before moisturizing and applying sunscreen. This timing helps protect the skin from environmental aggressors like pollution and UV exposure during the day while providing antioxidant protection and brightening benefits. It can also be used twice a day, but many experts recommend saving more photosensitive ingredients like retinol for nighttime. Vitamin C serum should be gently applied to clean skin and allowed to absorb before continuing with the rest of your skincare routine. For sensitive skin, it is advisable to start using the serum every few days and gradually increase to daily use. Vitamin C can also be used alongside other products like hyaluronic acid for hydration and retinol in nighttime routines but should not be layered directly with retinol to avoid irritation. Proper storage of vitamin C serum (cool and dark place) is important to maintain its effectiveness. Results from consistent use are typically seen within about three months.
