Smoked meats have high levels of carcinogens. The carcinogens are created when food cooks at a high temp. For smoking, in particular, they are created when fat drips on to the heat source and then the resulting carcinogens end up in the meat [0].

Cured meats contain nitrates or nitrites, both of which have been associated with an increased risk of cancer.

0: https://health.clevelandclinic.org/is-smoked-meat-bad-for-yo...

Not only smoked meats, any meat/fish/poultry cooked at high temperature (above 300 ºF) contains carcinogenic substances [1].

[1] https://www.cancer.gov/about-cancer/causes-prevention/risk/d...

I was thinking of smoking meats in particular.