tobacco immune system Nicotine and autoimmunity: The lotus' flower in What are the Effects of

Story highlights Khat is plant that once chewed gives a mellow high to its consumer It's been consumed for centuries by people in the Horn of Africa and parts of the Middle East Farmers in Kenya have been hit by a Dutch ban on imports of khat Some analysts say there are purported links between the khat trade and terrorist funding Its an oval-shaped, bitter tasting leaf that makes you chatty after chewing it, while inducing a feeling of euphoria and alertness

Many smokers already know the health risks of smoking

Strengths, weaknesses and methodological challenges A major strength of this study is that it is based on nationwide registers and therefore includes the whole adult Danish population aged 30 years or more over a period of 25 years

Women who smoke are more likely to die from C.O.P.D