Preservatives are one of the most important yet overlooked parts of any skincare formula. They prevent bacteria, mold, and yeast from growing in products that contain water, keeping your routine safe and effective. Among them, sodium benzoate is one of the most widely used—and often misunderstood—ingredients. So, what is sodium benzoate, and why is it added to skincare? It’s a salt derived from benzoic acid that helps extend a product’s shelf life and maintain stability. You
