Oxytocin is an age-specific circulating hormone that is necessary for muscle maintenance and regeneration
Nature Communications (2014) - Comments
pubmed: 24915299  doi: 10.1038/ncomms5082  issn: 2041-1723 

Christian Elabd, Wendy Cousin, Pavan Upadhyayula, Robert Y. Chen, Marc S. Chooljian, Ju Li, Sunny Kung, Kevin P. Jiang, Irina M. Conboy