eli5 how can a bathroom scale determine the body fat, water content and “dry” bone mass just from passing some electrical current?
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It messures the resistance and does calculations based on programmed data set it has . Its not going to be 100% acurate but good enough for anyone that isnt doing serious science. If you are planning to lose weight you can use it to track progress.
For people that say that its “useless” becouse they dont give accurate information have also not figured out that those automatic bloodpressure mesurements that hospitals uses are also not accurate but an estimation based on the mean arterial pressure.
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