Here's six values for eleven days, each soberly right after getting up after using the toilet: Body weight in kg / body fat percentage 72.9 / 7.1 72.8 / 9.1 72.5 / 8.3 72.6 / 8.8 73.0 / 9.5 What that tells me: now, it is very unlikely that in a few days with almost uniform weight of the body fat percentage varies by two percentage points. That would mean that I have gained 1.5 kg of fat mass was within two days, while the corresponding kilograms reduced elsewhere in the body. The scales are not therefore guide values, but more. This does not mean that the scale measures wrong. The measurement result is likely to be affected but, in my view, for example, from the salt intake of the last meal, the fluid intake, the glycogen content of the muscles. Thus, the weight may stay the same, when I have more carbohydrates (glycogen) stored in my muscles than before, but have less water in the gastrointestinal tract. On body fat has then absolutely nothing changed, it is only temporary storage in the body just filled just less or more. The balance is thus particularly suitable for persons who are aware of such relationships or to read up on the subject slightly. For me, they are orientation values and fluctuations of KFA I think about first, that to lie or take to get together a realistic picture, the measured values of several days. In the end, the bottom line is your own reflection is often but more meaningful than the value of the fat scale. What I can also recommend: Kaliper measurement. Although this is complicated, but the development of the thickness of the fat folds should halt unlike the bioimpedance analysis result of the fat balance not be dependent on whether I have just eaten in salt and if in my muscle carbohydrate stores are just full or empty. The product I would buy anyway again, because the weaknesses are clearly not product-related but are located on the measurement method on itself, are therefore likely to occur in any body fat scale. From the processing and the quality of the balance is good.