I commonly hear from my clients, "What are Epsom Salts and how do they work?"
Epsom Salts are essentially magnesium and sulfates once they are added to water, broken down and dissolved. By adding Epsom salt to your bath, the theory is that your body can absorb the magnesium through your pores in the bath, and act as a natural "muscle relaxer", according to how a muscle contracts on a cellular level. For a muscle to contract, it needs calcium. Magnesium is a natural calcium blocker and will not allow the calcium to activate the proteins needed to cause