Most of the problems with smoking are actually caused by small circulation blood flow issues. And then to worse oxygenation. This is a common cause of ED but fi

Most of the problems with smoking are actually caused by small circulation blood flow issues. And then to worse oxygenation. This is a common cause of ED but finding enough evidence will be tricky as it is not reported well. So don't get too hung up (sic) on that point. Some people are more susceptible than others, and even then the telltale (as in other than "worse on ergometer") medical issues tend to start after years (sometimes many) of smoking. Based on stats it is about 20 years of delay in specific cancers. Then they are hard to reverse. Sample of 1 is not compelling.