There have been lots of studies about the heart-healthy benefits of drinking alcohol in moderation, particularly red wine. While there has been some research to suggest that a drink or two per day can help raise HDL (good cholesterol), the jury's still out. If you don't drink, there's no reason to start because of these potential benefits. There are enough other risks associated with drinking to make sure you keep it in moderation. Excessive alcohol consumption can actually raise your triglycerides (fat levels in the blood), as well as lead to conditions such as high blood pressure, heart failure and obesity.
Scientists are unsure whether drinking lots of caffeine will increase your risk of heart disease -- results of studies so far are mixed. It seems to depend on how each person individually metabolizes caffeine. But if you find yourself feeling dizzy or having heart palpitations after drinking more than a few cups of coffee a day, consider cutting back.