The claimEvidence A · guideline-tier
Bacon is as carcinogenic as smoking (IARC Group 1)
The evidence
IARC Group 1 measures certainty of evidence, not magnitude; Bouvard 2015 (Lancet Oncol): 50 g/day processed meat carries colorectal RR≈1.18 vs smoking's lung-cancer RR≈15-30.