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This trendy, but sometimes stinky, supplement is popular for its “brain fuel” properties and for heart and skin health alike. Inside each capsule or each bite of freshwater fish, there are high levels of omega-3 fatty acids. Omega-3s are essential for proper body function, but are not produced by the body. They need to be obtained through food, at least. Click here for more food sources of omega-3 fatty acids.

fish oil

It goes deeper than function, though. Research on this essential fatty acid shows its ability to literally stop inflammation from happening as well as treat inflammation that’s already there. (via LEF)

Many women turn to this supplement to treat PMS symptoms, including mood swings, and fish oil is often taken to lower the risk of breast cancer. Yet, there are conflicting studies published each year that go back and forth on cancer-preventing and cancer-causing side effects. The overall benefits from this supplement are not concrete. It’s important to talk to a doctor before beginning a fish oil regimen. Omega-3s like DHA can also be obtained through flax or chia seeds and walnuts.

Fish oil should be taken in moderation via capsules. It is “likely safe” for most people. Pregnant women and breastfeeding mothers should talk with their doctors first. The safest dose is less than 3g/3000mg per day. For people with bleeding or clotting problems, fish oil supplements should be avoided.

>> Read more: Oh Snap! 13 Must-Have Vitamins for Healthy Body Functions