What are the health implications of eating one can of fish every day?

According to Livestrong, many varieties of fish are rich in vitamin A, vitamin D, calcium, and magnesium.

Plus, some varieties are high in omega-3 fatty acids that, according to the Washington State Department of Health, can lower your blood pressure, reduce your risk of arthritis, and decrease the risk of depression, Alzheimer's, dementia, diabetes, and ADHD.

A 2006 report from two Harvard School of Public Health professors also found that an appropriate intake of fish every week can lower a person's chances of dying from heart disease.

Fish can contain some contaminants— including mercury, Polychlorinated Biphenyls (PCBs), and other toxins.

But, these toxins are more common than you think and many common foods contain more toxins than fish. A Harvard report found that the toxic PCBs are actually more present in other foods than in fish. Upwards of 90% of PCBs and dioxins can be found in non-seafood sources like meat, dairy, eggs, and vegetables.

There's also insufficient evidence on the effects of long-term mercury consumption from eating fish, so Harvard reported that the FDA doesn't recommend that adults limit their fish intake based on fear of toxins alone.