Well-known documentary maker and longevity researcher Dan Buettner has shared the three foods that "will increase your chances of living past 90".

The published author took to the popular social media platform Instagram to share the secrets to a long and healthy life.

He told his fans: "Because of these foods, the people living on the Nicoya Peninsula of Costa Rica are 2.5x more likely to reach the age of 92 than people living in the United States or Europe."

He then went on to pose the question: "How many of these do you eat every single day?"

Dan Buettner shares the three foods that 'will increase your chances of living past 90'

In a video shared with his 617k followers, Dan Buettner went on to praise the Nicoya Peninsula in Costa Rica for its high life expectancy and low middle-age mortality.

He put most of this down to what he described as "the best diet human beings have ever invented."

This diet was said to consist of corn, which is used to make "delicious" whole grain tortillas, squash and "five different varieties of bean".

He added: "(That with) those three foods together, you can live your entire life.

"You need a little vitamin B12, but it has all the complex carbohydrates and protein necessary for human sustenance."

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Previously, the researcher explored the diets and lifestyles of those living in so-called Blue Zones in a Netflix documentary called Live to 100.

These Blue Zones are said to be areas with the healthiest and longest-living populations.

These include Okinawa in Japan, Sardinia in Italy, Nicoya in Costa Rica, Ikaria in Greece and Loma Linda in California.