Just for your information:
https://www.uth.edu/media/story.htm?id=1692785a-5886-46e8-81...
Reading the Wikipedia article on the "china study" doesn't seem that it's all definiteley related to dairy (or animal food consumption).
https://www.uth.edu/media/story.htm?id=1692785a-5886-46e8-81...
See the in-your-eyes clickbaity titled video.
> Do countries with high milk consumption have shorter life spans?
Total lifespan is dependent on a lot of factors. But YES moving to dairy as a population shortens your lifespan by greatly increasing a bunch of sicknesses. See "the china study" for more in-depth info.