Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a shiny gray solid and is the eighth most abundant element in the Earth's crust. Magnesium is essential for all cells and some 300 enzymes. It plays a critical role in the structure and function of the human body, including muscle and nerve function, blood glucose control, and blood pressure regulation. In the context of food and spices, magnesium is an important dietary mineral found in various foods, including nuts, seeds, whole grains, and leafy green vegetables. It is not volatile and does not dissolve in water, alcohol, or fats, but it can react with water to form magnesium hydroxide and hydrogen gas. Magnesium compounds, such as magnesium chloride and magnesium sulfate, are more soluble and are often used in food processing and as dietary supplements.