Not really, most are bleached, most of the minerals are not present, have added chemicals and probably contain plastics. You're best off getting this stuff : http://www.amazon.co.uk/Light-Celtic-Vital-Mineral-Blend/dp/B000SWTKV0/ref=sr_1_1?ie=UTF8&qid=1448228763&sr=8-1&keywords=celtic+sea+salt+fineluke wilson said:- Sea Salt - The ones you buy in supermarkets is ok?.. Plus you just take half a tea spoon and dissolve in a glass of warm water then drink?