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This exposes participants to cotinine (the main metabolite of nicotine found in the bloodstream) levels suggestive of moderate tobacco exposure, equivalent to that found in light/moderate cigarette smokers, the study notes

Among the findings were adverse effects on the: Heart Reproductive system Lung Kidney The study also found strong evidence linking nicotine usage to several cancers including lung, pancreatic, and breast cancer in humans

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Common physical causes of erectile dysfunction Atherosclerosis (clogged blood vessels) High blood pressure High cholesterol Low levels of testosterone Metabolic syndrome (a condition with increased blood pressure, body fat around the waist, high cholesterol, and high insulin levels) Obesity Peyronies disease (a condition where scar tissue develops inside the penis) Sleep disorders Smoking tobacco Some medications Surgeries or injuries that affect the spinal cord or pelvic area