Also what definition of "safe".

My grandpa eats at least one burger per week and he's turning 90 next year. So obviously "safe" isn't a measure of imminent and near term death?

Only $209 per year for access to the content

Or

Similar research from around a year ago:

https://www.researchgate.net/publication/378589731_Ultra-processed_food_exposure_and_adverse_health_outcomes_umbrella_review_of_epidemiological_meta-analyses/

"Introduction Ultra-processed foods, as defined using the Nova food classification system, encompass a broad range of ready to eat products, including packaged snacks, carbonated soft drinks, instant noodles, and ready- made meals. 1 These products are characterised as industrial formulations primarily composed of chemically modified substances extracted from foods, along with additives to enhance taste, texture, appearance, and durability, with minimal to no inclusion of whole foods. 2 "

https://en.wikipedia.org/wiki/Nova_classification