From my palliative care end of life days over 30 years of noticing: the folks who had the most pleasant deaths were: Hare Krishna folk Catholic Alcoholic folk, usually men Moslems. and then the rest... Those who had the most horrible painful deaths were Evangelical Christians Mahayana Buddhists Vegans and then the rest... Interestingly, Hare Krishna and Vegans have the same diet, so I'd suggest that the meaning of life, at the end of life, in terms of rank human life suffering, has more to do with something other than diet.