Board Thread:Wiki Discussions and Support/@comment-5090714-20150427053956/@comment-1986883-20180130095625

Actionmanrandell wrote: another thing. its canon fact that he can die because of a lack of nutrients. this means that he was logically dead inside of a week since the human body can not go more than 1 week without water

Yes but maybe he can eat dirt, he did not necessarily starve to death. His nutritional requirements are not necessarily the same as ordinary people. Many lifeforms in the real world can eat dirt, from plants to fungi to earthworms, it would not be that strange if a ninja had that ability.

According to Naruto Second Fanbook, cited in the Hidan article, Hidan is in fact alive but is dying slowly from a lack of nutrition. Maybe the reason for this is, he is staying alive by eating dirt, but the dirt does not have enough vitamins and minerals for him to maintain his health long-term, making his death very very slow.