I use quite a lot of dietary supplements, because I believe that we in the faster food that brings the occupation, to compensate for certain vitamins, minerals, etc. required. The usual (very expensive) magnesium, which can be found in drug stores is usually very little bioavailable. This means that the body can not make good use of and most of it is excreted. Magnesium citrate is here virtually the best variant. Would buy the product again.