Molecular gas mass fraction as a function of stellar mass for the CO-VG sample (left) and the CO-CS sample (right). The H₂MS from Janowiecki et al. (2020) is represented as a solid black line. The dashed black lines represent the ±0.2 dex offset to the H₂MS. Galaxies are colour coded according to their positions on the SFMS as described in Fig. 3. The mean logarithm of the molecular gas mass fraction per M_⋆ bin is shown with a blue dashed line for the CO-VG and a blue solid line for the CO-CS considering only those galaxies that belong to the SFMS. The extent of this line represent the width of the stellar mass bin. The error of the mean value is represented with a grey shadow. The M_H2 upper limits are represented with downward-pointing arrows.