I was reading this report:

2014 Surgeon General’s Report: The Health Consequences of Smoking—50 Years of Progress

CDC’s Complete Surgeon General’s Report and Fact Sheets

And saw this:

This report finds that active smoking is now causally associated with age-related macular degeneration, diabetes, colorectal cancer, liver cancer, adverse health outcomes in cancer patients and survivors, tuberculosis, erectile dysfunction, orofacial clefts in infants, ectopic pregnancy, rheumatoid arthritis, inflammation, and impaired immune function. In addition, exposure to secondhand smoke has now been causally associated with an increased risk for stroke.

If someone is diagnosed with any of these conditions, you’d have to suspect either smoking or exposure to second hand smoke as a contributing factor. If not the cause.

Here are some numbers:

Diet matters. But it’s not just diet.