Contents Understanding Serums and Their Benefits What is a Serum? Why Use Serums? Key Ingredients for DIY Serums Vitamin C Hyaluronic Acid Retinol Aloe Vera Essential Oils Safety Precautions and Patch Testing Patch Testing Safe Dilution Ratios Allergies and Sensitivities Easy DIY Serum Recipes Hydrating Vitamin C Serum Nourishing Hyaluronic Acid Serum Rejuvenating Retinol Serum … Continue reading Create Your Own Custom Serum with Easy DIY Recipes