In 2015, a group called the International Agency for Research on Cancer (IARC) said that eating a lot of red meat might cause cancer in humans. They also said that eating processed meat (like hot dogs or bacon) can cause cancer in humans.
Now, some time has passed, and scientists want to look at the newest research on this topic. They found some new studies that support what the IARC said before. But there are still things we don’t know about why red and processed meat might cause cancer. We need to figure out what in the meat causes cancer and how cooking it might affect this.
Reference: Domingo JL, Nadal M. Carcinogenicity of consumption of red meat and processed meat: A review of scientific news since the IARC decision. Food Chem Toxicol. 2017 Jul;105:256-261. doi: 10.1016/j.fct.2017.04.028. Epub 2017 Apr 24. PMID: 28450127. https://pubmed.ncbi.nlm.nih.gov/28450127/