I'm a smoker...So for me could u please tell me abt healty diet?

Antioxidants. Saying "i'm a smoker" sounds like you intend to keep smoking, despite the health risks involved. For the sake of your health and your family, i'm sorry that you feel that way. With the same attitude, my mother died of lung cancer. You at least need a diet high in antioxidant vegetables and fruits, and only grass-fed beef if eating beef. If on vitamins, make sure to use only natural vit e.