https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3483430/ "The available evidence indicates strong associations of processed meat consumption with incident CHD [coronary heart disease] and DM [diabetes mellitus], more modest associations of unprocessed red meat consumption with incident DM, and smaller or no associations of unprocessed red meat consumption with incident CHD." https://jamanetwork.com/journals/jamainternalmedicine/fullarticle/1134845 "Red meat consumption is associated with an increased risk of total, CVD, and cancer mortality. Substitution of other healthy protein sources for red meat is associated with a lower mortality risk." https://www.ncbi.nlm.nih.gov/pubmed/27479196 "High animal protein intake was positively associated with cardiovascular mortality and high plant protein intake was inversely associated with all-cause and cardiovascular mortality, especially among individuals with at least 1 lifestyle risk factor. Substitution of plant protein for animal protein, especially that from processed red meat, was associated with lower mortality, suggesting the importance of protein source."