The Food and Agricultural Organization of the United States defined "superfood" as a food source that is rich in antioxidants and high in nutrients, thereby preventing a variety of disease like cancer, heart problems, diabetes and other fatal conditions.

The National Health Service recommends that people regularly eat superfoods to boost their immune system, while maintaining a fit and healthy lifestyle.

Here are five sources that should be included in your daily diet.

1. Acai berry

It is a fruit that originates from the acai palm tree which is grown in South and Central America. It contains more antioxidants than cranberries, blueberries and raspberries. Acai berries can provide various benefits like getting rid of toxins and free radicals in the body, thereby giving you a brighter complexion. It also aids in weight loss.

2. Moringa

The herb provides several therapeutic effects that can stimulate the circulatory system. As a result, people prevent or treat hypertension, diabetes, inflammation, high cholesterol levels, obesity and the development of tumors. Moringa can also treat a variety of infections.

3. Quinoa

Quinoa is a superfood that is very rich in fiber. It contains more fiber than other grains like oats and brown rice. Quinoa also contains iron and lysine. It is very effective in boosting brain function and helps you feel full most of the time, which can help in losing weight.

4. Maca

Maca is a root that is usually sold in powder form. It is also known as Peruvian ginseng. It is known as a food supplement and provides benefits like improved sexual function, improved mood, increased energy and better overall health.

5. Chia

Chia seeds come from the Salvia Hispanica plant which grows in South America. These are low in calories and are proven to be effective in boosting brain function and blood circulation in the body. The seeds also aid in digestion and will boost focus and energy.

All of these superfoods are also available in purely organic form, so you do not suffer from side effects and adverse drug interactions. Eating these regularly will provide optimum health and prevent the development of disease for several years.