Abstract: Disclosed herein are embodiments of therapeutic substances that contain solid sodium percarbonate for use in a bath, and packaging for the therapeutic substances. The solid sodium percarbonate can be dissolved in a liquid, such as water, to produce a hydrogen peroxide solution. Hydrogen peroxide solutions can be provide beneficial effects to a user. The titrated sodium percarbonate can be mixed with other chemicals/materials in a pre-made packaging for ease of storage and using with a bath.