Looking for a gold-standard measure of Total Body Fat as a possible better predictor of Cardiovascular Disease Mortality in comparison to BMI (Ortega, et al. 2016) - see also Considering obesity using BMI - are body composition analysers such as these from Tanita actually able to accurately measure Total Body Fat, Body Fat Percentage, Fat Free Mass, viceral fat levels etc. or are the readings they provide estimates?
How else can accurate measurements of total body fat be achieved?
Ortega, F. B., Sui, X., Lavie, C. J., & Blair, S. N. (2016). Body mass index, the most widely used but also widely criticized index: would a criterion standard measure of total body fat be a better predictor of cardiovascular disease mortality?. In Mayo Clinic Proceedings (Vol. 91, No. 4, pp. 443-455). Elsevier. doi: 10.1016/j.mayocp.2016.01.008 pmcid: PMC4821662