Hmmm, I wonder if they’re conflating processed foods and red meat again?

Yep:

Eating processed red meat (such as sausages, bacon, hotdogs and salami) was linked to a 16% higher risk of dementia and a faster rate of cognitive ageing. Eating about two servings of processed red meat a week raised the risk of dementia by 14% compared with those who ate less than about three servings a month. (A serving is a piece of meat roughly the size of a deck of playing cards – around 85g.)

If people substituted processed red meat protein for that found in nuts, tofu or beans, they could reduce their dementia risk by 19%, the study found.

A review of studies, published in 2023, found that people who ate lots of ultra-processed foods (of all kinds – not just processed meats) had a 44% higher risk of dementia