Answer
1. If people eat these foods in big amounts (large quantities), it may be dangerous.
2. Certain foods are thought (believed) by scientists to have a positive effect on our bodies.
3. Foods with a lot of fat in them (fatty foods) may cause health problems.
4. Some foods may cause (trigger) health problems that last long into the future.
Collocations:
1. Healthy lifestyle
2. Nutritious food
3. Balanced diet
4. Fresh produce
5. Lean protein