11. Alcohol

Alcohol is one of the most dangerous poisons that is legal around the world, and people willingly pour into their bodies. Of course, moderate drinking is fine, but any drinking leads to risk of addiction and that can be fatal.

Alcohol abuse is the second most common cause of cancer after smoking. Excessive drinking is one of the top reasons for life-threatening conditions like strokes, heart failure, sudden death, breast cancer in women, and more.