The document claims there are 5 surprising health benefits to smoking, though it acknowledges smoking is largely harmful and causes early death. The benefits discussed are: 1) Smokers have a lower risk of knee replacement surgery, possibly due to being less likely to be obese or jog. 2) Smokers have a lower risk of Parkinson's disease, though the protective factor is unknown. 3) Smoking suppresses appetite and thus lowers obesity risk. 4) Smokers have lower mortality rates after some heart attacks. 5) Smoking helps the heart drug clopidogrel work better by activating proteins that convert the drug. The document questions if certain chemicals in tobacco may have therapeutic value.