今年104岁了！

A bit from the top of my head: Sugar should be pretty obvious, its practically a drug. It tastes great cause evolutionarily fruits etc. where a great source of energy and nutrients. Now its midguided cause lack of energy is not that much of a problem in most developed countries. But you brain still goes "this is good, more, you will survive another day!" its an evolutionary mismatch where our instincts dont match the lived reality anymore. And most people dont get their sugar by fruit but by concentrated amounts of refined sugar. Add the sedentary lifestyle to it and people baloon up without realizing the massive amount of calories they consume in a small package. --- But meat can also be a problem, unless your an inuit who has some genetic adaptaptation for a mostly meat based diet (and they dont really eat much red meat I think). The meat digestion is a bit of work for the body with many steps included. Its possible for example to get gout symptomes cause your body cant catch up with removing all the urea that gets created by breaking down/processing animo acids. If blood concentration gets to high it starts forming crystals in your joints, causing the physical pain. Normally not a problem but people eat way too much meat, the recommandation is like 300g-500g *per week*, not per dish. Oh and "animal protein" is bullshit, proteins get broken down to aminoacids either way and how you got the AS you need doesnt actually matter that much for protein biosynthesis. There was a study testing this and the only *slight* difference in bioavailability was in top ranks of bodybuilders or something. You can absolutely bulk up on a meatless diet if you want to. Also there is a connection between meat and some kinds of cancer, especiall with red meat. --- Milk is also an intesting topic, humans dont actually *need* it (we dont need that much calcium, unless milk is your only source of it). Ive read conflicting studies about it but still wanted to include milk as its a major part of many peoples diet. But whats true is that human couldnt originally process milk, you see this in asia(?) where most people have some form of lactose intolerance, which actually is the "standart" for humans and we adapted since settling down and keeping animals. Milk also gets processed (Homogenization) so that the fat particles get split up to keep a stable solution. There are ongoing studies that look into it cause the smaller fat particles can "just" permeate the lining of our intestines and if that may have adverse effects on health. --- Nutritional science is incredible complex and most people honestly know jack shit about it. You dont hear or read much about the thick of it unless you seek it out or choose an education in that line.