Fish Oil
Useful for: Mild depression, meaning that you have some symptoms but can get through the day without them affecting your life too much. (If you have no idea if yours are mild, check out a PHQ-9 ratings scale like this one.)
What to take: Start with one gram a day; you can go up to two. Fish oil has two components: EPA and DHA. Look for at least 60 percent EPA (40 DHA). Be patient: It may take six to eight weeks to have an effect.
What else to know: If your cholesterol is high, keep tabs on your labs; fish oil may slightly increase LDL, which isn’t always ideal (although it may also lower triglycerides and blood pressure, which is good). And it can thin the blood, so talk to a doc before taking this if you’re on blood thinners.