Ancient Minerals bath flakes are the dry flakes of magnesium chloride and other naturally-occurring trace minerals in a convenient and economical form that can be used in baths and foot soaks. Magnesium bath flakes are a form of transdermal magnesium, a method of mineral supplementation designed to deliver magnesium through the skin for rapid absorption into the cells. These flakes have been sourced from the Ancient Zechstein Seabed in Northern Europe and when added to a warm bath, this therapeutic product works to improve skin hydration, promote the removal of toxins, speed wound healing, enhance skin barrier function and decrease inflammation. Ancient Minerals Bath Flakes are perfect for relieving muscle aches and cramps, including period pain.