Firstly, we wanted to analyze the repeatability of the data to get the gist of the reported value variability necessary to establish error estimation. For this purpose, permeability measurements for the same molecules were considered using the same method at similar conditions (see Method section). The most prevalent experimental method in the MolMeDB is PAMPA. We have taken seven most studied molecules. They are listed in Table , along with the number of measured data points, average permeability, and standard deviation. When visualizing the data from these seven molecules measured by PAMPA (Fig. ), we see several different behaviors of molecules, that can be discerned between intrinsic and apparent permeabilities.