Magnesium is an essential dietary mineral that plays many important roles. This mineral helps increase energy levels, relaxes nerves and tension, supports bone density, helps maintain muscle mass, muscle power, and physical performance, and supports the digestive tract. It also helps promote calmness allowing for better sleep and reduced insomnia, helps prevent muscle cramps, tightness, and soreness, and helps stop headaches. As such, a Magnesium deficiency affects your heart, blood vessels, muscles, and bones as well as your blood sugar levels. To remedy a Magnesium deficiency, here are 14 of the best Magnesium supplements on Amazon: