However, despite a modest impact on body composition, adult age myostatin inhibition does prove effective in protection against diet-induced fatty liver ([19], this work) and atherosclerosis (this work), thus prompting us to consider organ-specific effect of myostatin (and its inhibitors) on metabolic regulations without being overwhelmed by the hyper-muscular phenotype found in mice with life-long genetic myostatin blockade. The gene discussed is MSTN; the disease is atherosclerosis.