my father, mom, brother, 2 lil sister, 1 older sister all small2 frame n skinny to thin type....but i manage to breakout the tradition...u just need to have good eating habit, dont be a picky eater, eat either 3 very big meals daily or 5 to 6 smaller meals n total calorie per day for me if possible no less than 2400kcal...

also weightlifting is essential as it spike ur male growth hormone into high gear...