The website realsimple.com has compiled a list of items.
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Acai
This fruit from South America has high levels of antioxidants that can help fight cancer and heart disease.
Goji berries
This fruit contains a ton of vitamin C. It has been used in Asia for centuries to help boost the immune system and treat poor circulation.
Seaweed
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These vegetables from the sea have omega-three fatty acids, which can prevent heart disease and stroke. It's also loaded with calcium, iron and zinc.
Kefir
Kefir is something that you drink, and it has a similar taste to yogurt.
Kefir is loaded with probiotics, which help your digestive system.