eli5 how can a bathroom scale determine the body fat, water content and “dry” bone mass just from passing some electrical current?

Question

eli5 how can a bathroom scale determine the body fat, water content and “dry” bone mass just from passing some electrical current?

In: 796

Answer 1

It can’t, if it was that easy would there be no reason for that huge amount of papers there has been done in the subject. Only a doctor can correctly estimate your numbers.