The belief is "yes" but research on the topic is new and unfinished. Dr. D'Agostino specializes in ketogenic nutrition, and discusses exogenous ketones for exactly that purpose in two podcasts[1][2].

http://fourhourworkweek.com/2015/11/03/dominic-dagostino/ http://fourhourworkweek.com/2016/07/06/dom-dagostino-part-2/