1 Litre bottle Magnesium Oil Soak contains a highly concentrated form of 100% natural and pharmaceutical grade magnesium chloride. Efficiently replaces magnesium lost through modern diet and pressured lifestyles while you enjoy the most relaxing 20 minutes you will ever spend. Each 50ml dose delivers 7g of the purest elemental magnesium, delivered in its most absorbable chloride form. Mined from ancient Zechstein sea deposits one mile below ground and over 250 million years old. Naturally filtered and condensed for a purity second to none.