Researchers Question Science Behind Blue Zones Longevity Concept

The concept of blue zones, geographic areas where residents reportedly live longer than average, originated about 25 years ago in Europe before gaining widespread attention through National Geographic coverage and a 2023 Netflix series. Eric Topol, a cardiologist, executive vice president and professor at Scripps Research, said the idea began with researchers using blue dots on maps to mark locations of extreme longevity, particularly on an island in Italy.

Michel Poulain, who is Belgian, helped validate some of those findings. The term "blue zones" came from the color of the ink used on the map. Topol said the concept proliferated after the initial work and took on a "special, secretive, mystical" quality.

The first blue zone identified was in the mountains of Sardinia. Subsequent zones were reported in Okinawa, Japan, and in California. Torie Bosch, editor of STAT's First Opinion platform, interviewed Topol and Shelley Wood, a medical journalist and author, for a podcast episode.

Wood said she first encountered the idea while on holiday in Sardinia about 12 years ago and later included a blue zone researcher character in an early version of one of her novels before cutting that storyline. Topol said he first took serious notice of blue zones after the 2023 Netflix multipart series.

He said he had seen related books but never read them. When writing his book "Super Agers," Topol deliberately omitted any mention of blue zones because he was uncertain about the underlying evidence.

Topol said the lifestyle conclusions promoted by blue zones research, including physical activity, diet and social connections, appear sound. He added that the question was whether the data supported those conclusions. Wood said that compared with the rigor of randomized clinical trials she covered during 25 years of cardiology journalism, the blue zones research seemed less robust.

She raised specific concerns about verifying the ages of individuals in the studied populations. "The conclusions seem right. " Topol said. Wood noted that researchers tied to the original blue zones work are sensitive to questions about data validation.

She said the common-sense nature of the health advice does not eliminate questions about linking specific origin stories to reported outcomes.

The term "blue zones" was later trademarked.

Wood said following the money is a standard approach in journalism. Topol said interest in longevity has existed for millennia, but the 25-year blue zones campaign brought it to the forefront. The concept has influenced today's broader longevity movement, which includes peptides and biohackers.

The interview concluded that while the promoted behaviors are sensible, the scientific foundation contains uncertainties that warrant further examination.