Secondhand smoke is a mixture of sidestream and mainstream smoke. Main sources include workplaces, public places, and homes. Most US secondhand smoke comes from cigarettes, followed by pipes and cigars
Smoking causes approximately 8 million premature deaths annually worldwide. Over 100 million people died prematurely from smoking in the 20th century. Most deaths (71%) occur in men. Smoking is responsible for about a quarter of global cancer deaths
Smokeless tobacco is used through chewing, sniffing, or placing between gum and cheek. South Asia accounts for 80% of global smokeless tobacco consumption. Products contain over 3000 constituents, including multiple cancer-causing chemicals
Cigarettes originated in Mexico and Central America around 9th century. First patented cigarette-making machine invented by Mexican Adorno in 1847. Modern cigarettes consist of tobacco blend, paper, and filter. Tobacco byproducts like blended leaf and reconstituted leaf improve taste
Ozempic contains semaglutide for type 2 diabetes management and weight loss. Works by stimulating GLP-1 receptors throughout body. Not approved for weight loss, but Wegovy is FDA-approved