Weigh the risks and then, if you still want to injure your system, trust your genes and enjoy the burning weed. That's what I did nearly sixty years ago.
Any time you do something which reduces the oxygen in your blood is a negative. So, if you still want to make a purely selfish decision and smoke ... go for it. I did. So far, the only down side has been heart disease which necessitated a bit of surgery and a pacemaker. I guess I beat my genes into submission. I never did smarten up and still enjoy the side effects of taking smoke into my system. It's the nicotine I so enjoy. So, you pays your nickle and takes your chance.
Any time you do something which reduces the oxygen in your blood is a negative. So, if you still want to make a purely selfish decision and smoke ... go for it. I did. So far, the only down side has been heart disease which necessitated a bit of surgery and a pacemaker. I guess I beat my genes into submission. I never did smarten up and still enjoy the side effects of taking smoke into my system. It's the nicotine I so enjoy. So, you pays your nickle and takes your chance.