I mean, it is an actual study done by the WHO. You can find it on their site for purchase, and the basic summary elsewhere, as well as their site. But I’m not seeing control groups or specific data, just conclusions/summaries.
Twenty-two experts from 10 countries reviewed more than 800 studies spanning 20 years to reach their conclusions. They found that eating 50 grams of processed meat every day increased the risk of by 18%. That’s the equivalent of about 4 strips of bacon or 1 hot dog. For red meat, there was evidence of increased risk of colorectal.
There was no control because it’s third party case study. Which… Ugh, really depends on the expertise, experience, and validity of those other studies.