When we got older our metabolism slowed down. Mostly it is the cause of weight gain. I'm partly surprised seeing my HS batch mates after 15 years. Most of them never look the same as before, thin and young, now they look old and huge. I will suggest to them to have a good exercise and take the best diet pill. I was doing this in fast few months to lose weight. I don't want to look fat and old on our upcoming HS reunion.