This is not correct. Nicotine may be carcinogenic on its own and is definitely implicated in the advancement of cancer in the presence of other carcinogens, and

This is not correct. Nicotine may be carcinogenic on its own and is definitely implicated in the advancement of cancer in the presence of other carcinogens, and it interferes with cancer response in the body and even cancer treatment. Caffeine has none of these properties and the usual vehicle for caffeine (coffee) has demonstrated protective effects against various cancers, heart disease, and diabetes.