What Happens if You Eat Fish Every Day

4. Fight depression
Scientists are still trying to determine why, but it’s clear that people who eat the most fish have lower than average incidence of depression. It may be that an overall healthy diet is associated with better mood, but we also know that omega-3 fatty acids can affect the level of feel-good chemicals dopamine and serotonin in the brain.

Finally, as fish is naturally able to reduce inflammation, eating a lot of it improves blood flow. That can also help improve brain function and smooth out mood swings.