Board Thread:Naruto Discussions/@comment-1512913-20170609150729/@comment-26104757-20170609182707

Also, Hashirama most likely inherited the full extent of Hogoromo's body, more than the rest of the Senju, being that he is Asura's descendant, and this genetic makeup gives him excellent vitality, and chakra unknown to anyone else. I believe his regeneration capabilities are credited not only because of his vitality, and chakra, but also an exceptional skill in chakra control, seeing as he can use Chakra-Enhanced Strength, which would later be recognised as an application of Medical Ninjutsu, and the basis of this branch is heavily dependant on one's chakra control.