uses of 12 minerals (salts) that should be present in our bodies in perfect balance. The salts are found naturally in the Earth's rocks and soils and are present in food grown organically in mineral-rich soils. Modern lifestyles and processed foostuffs lead to a depletion of these substances in our bodies and make us susceptible to a wide range of ailments. Margaret Roberts shares her vast knowlegde of how supplementing our diet with tissue salts can promote good health and treat ailments.