A JAMA study from February 2019 showed highly processed food kills you.
In 44 551 French adults 45 years or older, a 10% increase in the proportion of ultra-processed food consumption was statistically significantly associated with a 14% higher risk of all-cause mortality.
Ultra processed food has high amounts of sugar, salt and saturated animal fat.
This interesting study modeled the mortality reduction that would occur if Brits stopped eating ultra-processed food.