theses are the same capsules as the blister packs i also reviewed, while those are great for keeping around in your bag/purse for your on the go need to be able to take a dose/capsule. this bottle is well packaged and is secured uo to very evident tamper proof packaging which is a comfort to me atleast for any sort of supplements. just the same as the blister packs from this brand; If you are starting to feel discomfort and cramping/spasms in your body or a migraine coming on due to menstrual symptoms as well as for general leg cramping soreness and discomfort as well as spasmss and cramping from being on your feet too long, over working your muscles exercising and for the symptoms of chronic illnesses. i definitely think this is a great quality of magnesium and doesn't have the bowels/gi movement effects other types of magnesium is associated with.