Body Fat Measurement System – Futrex exclusive ability of measuring percent body fat by use of harmless light can be supplied to other health kiosk manufacturers. This avoids the problems with using the alternate technology – – – bioelectrical impedance (“BIA”) – – – that actually measures body water and electrolytes. Since both body water and electrolytes vary all during the day, the resulting BIA calculated percent body fat can be grossly in error. Another negative of BIA is that it should not be used to measure people who have either a heart pacemakers or internal heart defibrillators. None of these problems or limitations exists for the Futrex light measurement technique. For example, the Futrex system provides gold standard accuracy when ever measurements are made, e.g., before, during or after exercise or after eating a meal.