[mancerayder]

Could it be urbanization? Young people are more food conscious with before (organic food popularity, vegetarianism, which is good for reducing red meat consumption risks , awareness around ultra processed foods, banned chemicals in the EU, podcasts with bro science, etc).

Urbanization means exposure to chemicals and pollution and stress, and even if there are higher life expectancy, it's probably correlated with wealth since cities are increasingly for affluent people.