Old habits die hard. That is why so many people join support groups and utilize their friends and families when trying to quit an addiction. Israeli app "I stopped" takes the method of peer support online, using Facebook friends.

Many smokers find it hard or even impossible to quit. While the health risks of smoking are well-known, a new study from Tel Aviv University shows that people who reduce the number of cigarette they smoke, rather than quit altogether, can also improve their health.