Blue Zone, a Demographic Concept and Beyond

Area of Science:

• Gerontology
• Demography
• Public Health

Background:

• Blue Zones (BZ) are regions with high concentrations of healthy centenarians.
• Existing BZs include Okinawa, Sardinia, Nicoya, and Ikaria, with Martinique recently identified.
• Concerns exist regarding the reliability of centenarian age data in BZ identification.

Purpose of the Study:

• To review and outline the methodology for identifying and validating Blue Zones.
• To assess the reliability of centenarian data and demographic indicators for BZ status.
• To define criteria for Blue Zone designation using the Sardinian BZ as a benchmark.

Main Methods:

• A three-step methodology for BZ identification is detailed.
• Strict age validation procedures are employed to confirm longevity claims.
• Demographic indicators and a longevity threshold (50% above national average) are used for assessment.

Main Results:

• Martinique has been validated as the fifth Blue Zone.
• Galicia's Blue Zone validation is currently in progress.
• Core longevity factors identified include diet, physical activity, social support, and environment.

Conclusions:

• The Blue Zone model provides a valuable framework for understanding aging and lifestyle impacts.
• The 7 Blue Zone principles offer actionable strategies for promoting longer, healthier lives globally.
• Insights from Blue Zones are crucial for advancing public health and lifestyle medicine.