If you have any of the following symptoms you may have a magnesium deficiency,
Muscle cramps or twitches, Insomnia, Irritability, Sensitivity to loud noises, Anxiety, ADD, Palpitations, Angina, Constipation, Headaches, Migraines, Fibromyalgia, Chronic fatigue, Asthma, Kidney stones, Obesity, Osteoporosis, High blood pressure, PMS, Menstrual cramps, Irritable bladder, Irritable bowel syndrome, Reflux and Trouble swallowing.
Magnesium deficiency has even has been linked to inflammation in the body and higher CRP levels.