Vitamin C is best used in the morning because its antioxidant properties help protect your skin from environmental damage and free radicals you encounter throughout the day. It also boosts the effectiveness of your sunscreen. ​What to Pair with Vitamin C Serum? Hyaluronic Acid: A hydrating powerhouse that pairs perfectly with Vitamin C. Hyaluronic acid helps to plump the skin and retain moisture, counteracting any potential dryness from the Vitamin C serum. ​Vitamin E and Ferulic Acid: This is a classic "power trio" often found in professional-grade Vitamin C serums. Both Vitamin E and ferulic acid are antioxidants that stabilize Vitamin C and boost its free-radical-fighting abilities. ​Niacinamide: They can be a great combination for brightening the skin and improving tone. If you have sensitive skin, it's best to introduce them slowly or use products formulated to be layered together. What to Avoid Pairing (in the Same Routine)? Retinoids (Retinol, Tretinoin): It's generally recommended to use Vitamin C in the morning and retinoids at night. This is because retinoids can be potent and make your skin more sensitive to the sun, while Vitamin C works best with daytime sun protection. Using them at different times also minimizes the risk of irritation. ​Benzoyl Peroxide: This ingredient can oxidize and inactivate Vitamin C, making it less effective. It's best to use them in separate routines (e.g., Vitamin C in the morning, benzoyl peroxide at night). ​Strong AHAs/BHAs (Glycolic, Salicylic Acid): While some products are formulated to work together, using high concentrations of these acids with Vitamin C in the same routine can cause a lot of irritation, especially for sensitive skin. It's a good idea to alternate their use on different days or use them in different routines (e.g., AHAs/BHAs at night). ​#vitamincserum ​#vitaminc ​#vitamincskincare ​#ascorbicacid (for the pure form of Vitamin C) ​#skincarevitaminc ​#serum ​#brighteningserum ​#antioxidants ​#antioxidantskincare #juicychemistry