Final answer:
Vichy formulates its products with Pure Hyaluronic Acid, Pure Vitamin C, and Phyto Peptides.
Step-by-step explanation:
The four dermatological ingredients that Vichy formulates with include Pure Hyaluronic Acid, Pure Vitamin C, and Phyto Peptides. These ingredients are known for their various benefits to the skin. Pure Hyaluronic Acid helps in hydrating and plumping the skin, Pure Vitamin C is an antioxidant that brightens the skin and stimulates collagen production, and Phyto Peptides assist in improving skin elasticity and reducing wrinkles.
Learn more about Vichy dermatological ingredients