could u answer 1 quick question

Hi firstly i admire you hugely for the wonderful results of your fast. Im currently on day 8 of a juice fast and was a little worried to read an old post by an experienced faster who thought that if you didnt get your sodium and potassium balance just right you could have heart failure!! sorry to spring such a heavy question on you but it shocked me greatly as it was something i never thought of. Maybe she was refering to a Water Fast not a juice fast, but id realy appreciate your advice as id love to go as far as you but im feeling a little scared, cheers Emma .