This comprehensive little book explains the history and theory of biochemistry. It also includes detailed information about the 12 single tissue salts and an extensive repertory of symptoms with the advised tissue salts. An excellent 150 page guide of the Schuessler Tissue Salts. Tissue Salts are a homeopathic remedies that contains a minute dose of the minerals required for our bodies daily function. If there is an imbalance or deficiency in these minerals, illness may result. They are easily recognised by the body assuring easier assimilation and use, Tissue Salts naturally restore balance at the cellular level of your being.