Bath bombs usually are made with baking soda or sodium carbonate. This offers a naturally high alkaline substance with a reputation for helping to remove toxins. Baking soda’s natural sodium content and alkalinity give the bathwater a silky feel, and baking soda can help with several common health issues. The plant oils and baking soda soothe and add moisture to the skin. With such properties, you could certainly substitute them instead of your regular bath soaps.