The Vitamin C Serum by Cocokind is highly recommended by Jessica, who considers it her favorite brand on Flip. With a perfect 100 out of 100 on the ingredient score list, this serum contains no risky ingredients. Its lightweight and non-oily formula makes it a pleasure to use, while delivering excellent results. Jessica is impressed by its effectiveness and can't get enough of it. Overall, the Cocokind Vitamin C Serum is a top-notch product that lives up to its claims, providing users with a safe and efficient solution for their skincare needs.