It's unclear wether vitamins and electrolytes supplements were necessary or not during this fast. If you read the paper: https://pmj.bmj.com/content/postgradme

It's unclear wether vitamins and electrolytes supplements were necessary or not during this fast. If you read the paper: https://pmj.bmj.com/content/postgradmedj/49/569/203.full.pdf https://pmj.bmj.com/content/postgradmedj/49/569/203.full.pdf It looks like supplements were not given continuously. I'm not an expert but some doctors on youtube point to studies which show stable levels of many things during extended fasting: https://pubmed.ncbi.nlm.nih.gov/9374844/ https://pubmed.ncbi.nlm.nih.gov/9374844/ https://thefastingmethod.com/vitamins-and-calcium/ https://thefastingmethod.com/vitamins-and-calcium/ Fat, liver, kidney store lots of useful things. Some things like salt are easy to find all year anyway, they don't run away :).