Figure 1: Effect of testosterone on 3T3-L1 adipose differentiation. Red oil staining of mature 3T3-L1 adipocytes (scale bar, 70 μm) (Caprio M. et al., unpublished), classically differentiated in the absence (left) or in the presence (right) of 10−7 M testosterone. Testosterone treatment determines a marked reduction in size and number of lipid droplets, in accordance with previous reports [73].