Ancient Minerals Magnesium Bath Flakes, Epsom Salt Alternative, 1.65 lb

Most bath products are built around a scent. This one is built around a single ingredient: magnesium chloride flakes, which the maker says come from the Zechstein seabed deposit and contain no added fragrance or fillers. Where Epsom salt is magnesium sulfate, these flakes are the chloride form, and the maker describes them as quick to dissolve in warm water.

Many people use magnesium flakes for an evening soak as a plain alternative to perfumed salts and bath bombs. The listing is thin on practical detail – it gives no dose per bath and no soak time – so the amount comes from the bag, not from the product page. The 1.65 lb (750 g) bag is the smallest of three sizes.

Tip: Pour the flakes under the running tap and press the bag firmly shut afterwards – magnesium chloride draws moisture from the air, and an open bag in a steamy bathroom turns into one lump.