Dr. Bronner's Citrus Orange Castile Bar Soap, made with lemon essential oil, stimulates your skin and lifts your spirits. Completely biodegradable and vegetable based, Castile Bar Soaps are gentle and effective, perfect for washing body, face or hair. They are also very popular with DIY homemakers. For example, they can be grated to form part of a homemade powdered laundry detergent.