Healthy fats are essential—but doctors flag potential side effects to keep in mind if you're taking them in supplement form.

Dave thinks a lot about fish these days. Study after study has suggested benefits for omega-3 fatty acids, which are plentiful in certain fish oils. But what intrigues Dave isn't that omega-3s ...

All had their labeled amount of EPA and DHA, omega-3 fatty acids that can reduce the risk of heart attacks and strokes. And none exceeded limits for lead, mercury, dioxins, or polychlorinated ...