A new study is devastating for smokers.<br />A study by the journal Circulation says smoking and vaping produces harmful health effects similar to just smoking cigarettes on their own.<br />Participants who smoked and vaped had higher levels of inflammation and oxidative stress than those who did not.<br />People who vaped showed similar levels of inflammation and oxidative stress as those who did not.<br />According to UPI Health inflammation and oxidative stress are key contributors to smoking-induced heart disease