I had chronic headaches for more than 5 years and after doing a lot of research, I realized I might have magnesium deficiency. Right now , I no longer had those headaches . A lot of us are actually deficient in mg due to stress and mg is required for about 300 vital organs to function properly .. So it is very important. I have found this to be one of the best as it also contain other essential vital minerals like zinc, selenium. it also helped me with menstrual cramps. Best Purchase ever and highly recommend this product.