Magnesium is one of the most common mineral deficiencies. Signs and symptoms of deficiency relating to the musculoskeletal system include tense muscles, twitches, muscle soreness and weakness, cramps (including menstrual cramps), spasms and tension headaches. Essential for the electrical activity of nerves and muscles, magnesium also assists in the relaxation of muscles and the dilation of blood vessels. Bio Magnesium improves muscle function and includes vitamins C, D, B6 and Manganese to help with muscle energy. Including magnesium in your diet may also be helpful in promoting a good nights sleep.