Linear relation between the shift of the IRX-β_FUV relation at z = 0 (namely that of Overzier et al. 2010) vs. the mass-weighted age in years derived from the analysis of the galaxies studied here. Red symbols correspond to ALMA-detected objects, while blue objects correspond to upper limits from ALMA. We note, however, that these upper limits apply to ALMA, but not to the parameters presented in this figure: age_Mstar and β_z.