This is especially difficult for freshwater, terrestrial samples where the source water composition is fixed by the water cycle. (climateaudit.org)
They can show you the cold hard facts on a huge LCD screen, using weight, BMI, Body fat percentage, muscle, bone and water composition data. (idealhome.co.uk)
Like many others on test the scales track weight, BMI, fat percentage, muscle and bone mass as well as body water composition. (idealhome.co.uk)