I don't have a fast metabolism at all (my mom always said we'd be good in a famine), but I love to be active and I eat really well, which has made it easy to stay skinny. Only come to find out it back fired! I chalk up most of my weight gain to nuts and berger cookies. I'm from baltimore and these cookies are made there and my mom ships them to me - they're just thick flattened cupcakes as an excuse for eating fudge - YUM! But, if you have a hard time gaining weight, try taht weight gainer stuff - massive calories in a wee but delicious shake

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