Struggling to eat healthy at uni Watch
1. Foods high in refined sugars, e.g. sweets, sugary drinks, pastry etc.
2. Vegetable oils high in Omega-6's, namely soybean oil, canola oil, corn oil etc.
3. Avoiding trans-fats completely.
The things you should focus on, generally speaking:
1. Eating more foods that are high in fibre, so a lot of vegetables, sweet potatoes, fruits etc.
2. Eating foods high in micronutrients (the aforementioned vegetables, along with nuts, fruit, fish, eggs, chicken etc.)
3. Eating fish high in Omega-3's.
Many people would call the above diet a 'Paleo diet', in case you want to do more research and need a buzzword. When you've set up a healthy baseline similar to what I've outlined above (which has worked wonders for me personally), then you should increase your intake of healthy proteins to allow for a higher rate of muscle repair after your workouts (building muscle). Try doing a bit of research on a ballpark-estimate of how much protein you need per day depending on your bodyweight and work from there. If you feel like you're over-eating, try to reduce the amount of calories you eat whilst maintaining the quality of your diet (so eat healthy but just less in quantity).