https://arstechnica.com/science/2018/07/otzi-the-icemans-las...
"In the new study, Zink and his colleagues found that Ötzi had several gene variants associated with cardiovascular disease, including one on the ninth chromosome that is strongly tied to heart troubles, the researchers reported today (July 30) in the journal Global Heart."[2]
Fun fact: Otzi also had Lyme disease.
Also, there is no evidence that Otzi's people died young because of their diets. He was 45, so approaching middle age, and died while making a high mountain traverse with an arrow in his back. I would bet anything he was physically sturdier and, with modern medical care, healthier than nearly everyone posting here.
[1] http://www.sciencemag.org/news/2012/02/iceman-was-medical-me...
2] https://www.livescience.com/47114-otzi-had-heart-disease-gen...
Also, infant/child mortality was much higher at that time - if you count people that lived past the 30s life expectancy was likely not that different from nowadays.
https://www.cell.com/current-biology/fulltext/S0960-9822(18)...
"major proportion of plant reads belong to the species Pteridium aquilinum subsp. aquilinum and to members of the genus Triticum "
"the Triticum reads were more specifically assigned to chloroplast genomes of Triticum monococcum (einkorn) and Triticum urartu"
https://en.wikipedia.org/wiki/Einkorn_wheat
Wheat.
It seem the Iceman not only ate deer mean but also... wheat, so probably some kind of bread.
Also, for the context: the Iceman lived "between 3400 and 3100 BCE." It can be that he lived at the same time as Egypt already wrote about its first pharaohs (c. 3150 BCE)! And Egypt's key for success for millennia was in its... wheat production.
Moreover, the "Iceman" got frozen in ice by accident, but at that time the last ice age was also over for cca 5000 years.
Many things could point to stolen food and a harsh conditions. He was probably desperate for food. For a human eating fat regularly, he was very slim.
Just to point out, those 10k years of agriculture are actually the most recent 10k years, with potentially huge selection pressure for periods during that time.
"Interestingly adipose fat, most likely from the ibex, made up about half of the stomach contents. The team says this amount was unexpected, but it makes sense given he was living in such a hostile climate."
"The high and cold environment is particularly challenging for the human physiology and requires optimal nutrient supply to avoid rapid starvation and energy loss," says Albert Zink, an author of the study. "The Iceman seemed to have been fully aware that fat represents an excellent energy source."