I was previously a pescatarian for about the past 3 years, so now, I've only cut cheese, dairy, and fish out of my diet. It's been about a week that I've been completely vegan, and I've found that I'm hungrier than usual. But I think it's strange, because dairy never made up a large part of my diet even when I did eat it, and I ate fish once a week at the most. Why would I be feeling hungrier, then? My usual day of food consists of oatmeal in the morning, then a sandwich, a granola bar, and apple for lunch, a banana and some nuts for a snack, and then whatever's for dinner--usually some combination of vegetables and grains. I also run for about 45 minutes every day, and I'm 17 years old, if that makes any difference. I'm just wondering why this could be the case, and if I should be eating more, or what. I do eat a lot of fruit and vegetables, but still, I don't want to eat too much.