Everyone should patch test a new product, but it’s especially important for anyone with sensitive skin or those who have had previous bad reactions to any other products or foods. You may experience an adverse reaction to a product simply because your skin doesn’t like a specific ingredient (natural or otherwise) or your skin doesn’t respond well to the way a product is formulated. This can result in a rash (allergic contact dermatitis), or it can cause your skin to dry out, increase oil production or breakouts. The ingredients of products are listed on each product page to help you identify ingredients you may have existing sensitivities to.