Bad habits

Bad habits. Pleasure should be in moderation.

Вредные привычки. Удовольствий должно быть в меру.

Bad habits - how harmful are they? Can such bad habits like drinking alcohol and smoking cigarettes be useful or only cause harm? What kind of alcohol and how much should I consume so that I do not harm myself, but benefit? What kind of disease prevents tobacco smoking? Why should you refrain from using refined sugar? Harmful or useful to eat meat?