PPARA and sarcopenia: The protective effects of the nutraceutical decreasing sarcopenia in old rats is possibly due to the presence of OLE, EEVO and n-3 PUFAs since all of them are reported to prevent this condition [83,84,85,86] and may be mediated by increased PPAR-α as this receptor is highly involved in muscle metabolism [87] and its activation is reported to decrease muscle atrophy [88,89] and improve muscle function in aged individuals [87].