How do I gain weight fast?

hi I am 18 and under weight I weigh 45, im 165cm tall, im a size 6 I want to gain weight but I have a fast metabolism please help me.

Weight gaining powders you can get from your health food stores will help a lot. Also check out muscle magazines and read about the diets of weight lifters.

hey wattup???? my name is jimmy... I had the same problem "fast metabolism"... just eat things that are high in protein and eat as much as you can but don't forget to eat healthy

oh I forgot eat foods that are high in calories and don't forget to excercise so those calories turn into muscle

Eat a big breakfast. Good food. Eggs and meat. Meat is the secret. Eat meat. Losts of it.

Eat all your meals but dont stuff yourself, just eat ENOUGH!

Eat at night tooo!!!