How to gain weight if you have fast metabolism?

I am 14 and I weigh 75pounds. I'm very skinny Iknow. So please no need to remind me.anyway, I eat a lot. I mean I eat like 3 meals a day and I eat so much snacks. I also exercise daily. I don't get why it's so hard for me to gain weight but so easy for me to loose :( I need to gain weight fast ,before school starts which is on September.so I have less than a month. How can I at least gain 3 pounds?

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Recommended Answer:

Drink Ensure Plus. It comes in different flavors and can help you to put on the weight. However, don't overdo it. You don't want to be overweight.

Other Answers:

• you are just like me :L other people would die to have a metabolism that doesnt let u gain weight easily. Just consider urself lucky :)
• Eat calories not quantity and eat early in the morning quickly so you develop more gremlin (a hunger hormone) and don't excersize and u should gain weight also the faster you eat the more u gain