10 Reasons to Love Dark Chocolate 1. It's very nutritious. 2. A powerful source of antioxidants. 3. May improve blood flow and lower blood pressure. 4. It raises HDL and protects LDL against oxidation. 5. May lower the risk of cardiovascular disease. 6. May protect your skin against the sun 7. May improve brain function. 8. Helps control blood sugar. 9. Contains theobromine, which has been shown to harden tooth enamel. 10. High in vitamins and minerals.