Final answer:
Monounsaturated and polyunsaturated fats have the most positive effect on blood cholesterol levels, while saturated and trans fats have the most negative effects. Heart-healthy substitutions include monounsaturated and polyunsaturated fats.
Step-by-step explanation:
The correct order of fats, from most positive effects on blood cholesterol levels to most negative effects, is:
- Monounsaturated
- Polyunsaturated
- Saturated
- Trans
Heart-healthy substitutions include:
- Monounsaturated fats found in olive oil, avocados, and nuts
- Polyunsaturated fats found in fatty fish, walnuts, and flaxseeds