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The Secrets of the 5 Blue Zones Where Centenarians Thrive

What do Okinawa, Icaria, the Nicoya Peninsula, Sardinia and Loma Linda have in common? They’re home to some of the most substantial populations of overwhelmingly disease-free people who’ve crossed the 100-year mark. But what sets them apart from the rest of their countries – and the world? That’s what we’re here to find out.

A Blue Zone area is characterised by its unusually high concentration of centenarians (people who live to be 100 years or older) and the relatively low incidence of chronic diseases. These regions have attracted attention from researchers and health enthusiasts due to the remarkable longevity and overall well-being of their populations. Several factors contribute to the designation of an area as a Blue Zone: 

  • High Life Expectancy: The primary defining feature of a Blue Zone is the significantly higher life expectancy compared to surrounding areas. The presence of a considerable number of centenarians is a hallmark of a Blue Zone.
  • Low Rates of Chronic Diseases: Inhabitants of Blue Zones have lower rates of chronic diseases such as heart disease, diabetes, and certain types of cancer. This absence of chronic illnesses contributes to their extended lifespans. 
  • Healthy Aging: Not only do people in Blue Zones live longer, but they also tend to experience healthier ageing. Their quality of life in terms of physical and mental well-being is notable. 
  • Lifestyle Factors: Blue Zone populations often share certain lifestyle characteristics, such as physical activity, a predominantly plant-based diet, strong social connections, and a sense of purpose. These factors contribute to their exceptional health and longevity. 
  • Cultural Practices: Many Blue Zone areas have cultural practices that promote well-being. These practices can include regular physical activity, traditional diets rich in whole foods, and strong community ties.

  • Environmental Factors: Some Blue Zone regions benefit from clean air, natural landscapes, and access to fresh, locally sourced foods, which contribute to a healthier lifestyle. 
  • Mindful Ageing: The concept of ageing is often different in Blue Zones. Older individuals are respected and remain socially engaged, contributing to their sense of purpose and well-being.
  • Genetic and Environmental Interplay: A combination of genetic predisposition and favourable environmental factors likely plays a role in the longevity observed in Blue Zone areas.
  • Natural Movement: Blue Zone residents engage in "natural" movement as part of their daily routines. This includes activities like walking, cycling, and gardening, which promote flexibility and joint health.
  • Purposeful Living: Having a sense of purpose or "ikigai" (a reason for being) contributes to mental and emotional health. Blue Zone inhabitants often lead lives focused on meaningful activities, contributing to a positive outlook on life.
  • Slow Pace: Blue Zone communities often have lower stress levels due to their tight-knit social networks, slower pace of life, and emphasis on relaxation and leisure.
  • Cultural Traditions: Traditional practices, such as daily rituals, religious observances, and community celebrations, contribute to the emotional and psychological health of Blue Zone residents. 
  • Limited Exposure to Toxins: In some Blue Zone regions, a lack of exposure to environmental toxins contributes to better health outcomes.
  • Strong Sense of Community: Blue Zone communities place a strong emphasis on social connections. Supportive relationships and a sense of belonging contribute to lower stress levels and improved mental wellbeing.

The 5 Blue Zones

Okinawa, Japan

Located in the Ryukyu Islands of Japan, Okinawa boasts one of the highest life expectancies in the world. The Okinawan diet is largely plant-based, rich in vegetables, tofu, sweet potatoes, and seafood. Their lifestyle includes regular physical activity, strong social connections, and a cultural practice called "ikigai," which emphasises having a sense of purpose in life. Their diet consists of the following staples:

  • Sweet potatoes
  • Vegetables like bitter melon and seaweed
  • Tofu and other soy products
  • Fish, especially smaller varieties
  • Whole grains
  • Green tea
  • Turmeric
  • Fruits like citrus, papaya, and pineapple

Sardinia, Italy

Sardinia, an island in the Mediterranean Sea, is home to a population with exceptional longevity. The Sardinian diet is characterised by whole grains, beans, vegetables, and goat's milk. Their strong community ties, active lifestyles, and emphasis on family contribute to their health and longevity. Take a look at some of the foods commonly found in a Sardinian’s diet:

  • Whole grains, especially barley
  • Legumes, particularly fava beans
  • Vegetables like tomatoes, zucchini, and greens
  • Olive oil
  • Goat's milk and cheese
  • Red wine (in moderation)
  • Wild herbs and spices
  • Nuts, including almonds

Nicoya Peninsula, Costa Rica

The Nicoya Peninsula in Costa Rica is known for its high life expectancy and low rates of chronic diseases. The Nicoyan lifestyle is characterised by physical activity, social engagement, and a strong support network within the community. The local diet includes:

  • Beans, especially black beans
  • Corn and tortillas
  • Squash and other vegetables
  • Tropical fruits like papaya and mango
  • Fish and seafood
  • Chicken and eggs (in moderation)
  • Fresh herbs and spices
  • Whole grains 

Ikaria, Greece

Ikaria, a Greek island in the Aegean Sea, is recognised not only for its beautiful beaches and springs, but for its high number of centenarians. Regular physical activity, a leisurely pace of life, and strong social connections contribute to the health and longevity of its residents. The Ikarian diet emphasises whole foods, much like the other blue zones on this list, but the staples differ ever so slightly – here in Ikaria, the Mediterranean diet reigns supreme:

  • Vegetables like potatoes, greens, and tomatoes
  • Legumes such as chickpeas and lentils
  • Olive oil
  • Wild greens and herbs
  • Whole grains like whole wheat bread
  • Herbal teas, including sage and mint
  • Goat's milk and dairy products
  • Fish and seafood

Loma Linda, California, USA

Loma Linda is a unique Blue Zone located in California, USA. It is home to a community of Seventh-day Adventists who emphasise a vegetarian diet, regular exercise, and restful Sabbath observance. The Loma Linda lifestyle also prioritizes community engagement, stress reduction, and a sense of purpose. Now you don’t have to convert to Seventh-day Adventism to reap the benefits – take a look at some of the locals’ dietary staples:

  • Whole grains like oats and quinoa
  • Legumes such as beans and lentils
  • Nuts and seeds, especially almonds and walnuts
  • Fruits and vegetables
  • Soy products like tofu and tempeh
  • Dairy alternatives like almond milk
  • Water and herbal teas 

Diet plays a major role in each blue zone’s longevity, as we mentioned above the kinds of foods that are most prominent in each area, but there are a few general principles that all 5 stick to – and you can too.

The Blue Zone Diet: A Blueprint for Longevity


Plant-based abundance: The foundation of the Blue Zone diet is an abundance of plant-based foods. Vegetables, fruits, legumes, whole grains, nuts, and seeds form the cornerstone of every meal. These foods are rich in essential nutrients, fibre, and antioxidants that support overall health and longevity.

Beans and legumes: These are a primary source of protein in the Blue Zone diet. High in protein, fibre, and complex carbohydrates, they provide sustained energy and contribute to a feeling of fullness. Varieties like lentils, chickpeas, and black beans are staples in Blue Zone regions. 

Whole grains: Whole grains such as quinoa, brown rice, and oats provide sustained energy and are packed with vitamins, minerals, and fibre. They contribute to stable blood sugar levels and help reduce the risk of chronic diseases.

Nuts and seeds: Nuts like almonds, walnuts, and seeds like flaxseeds and chia seeds are rich in healthy fats, protein, and micronutrients. These small powerhouses offer heart-protective benefits and are associated with lower rates of heart disease.

Fruits in moderation: While fruits are part of the Blue Zone diet, they are consumed in moderation. Fresh, seasonal fruits provide natural sweetness, vitamins, and antioxidants, but excess consumption of sugary fruits is avoided.

Healthy fats: Healthy fats from sources like olive oil and avocados are included. Olive oil, in particular, is a common fat source in Blue Zone regions and is associated with heart health.

Limiting animal products: Animal products, especially red meat, are consumed sparingly in the Blue Zone diet. They are treated as a special occasion rather than a regular part of the diet. When consumed, they are often in smaller portions. 

Foods to Avoid in the Blue Zone Diet


Processed Foods: Highly processed foods like sugary snacks, fast food, and sugary beverages are not part of the Blue Zone diet. These foods are typically high in empty calories and lacking in essential nutrients. 

Excess Added Sugars: Foods and beverages with added sugars are limited. Excessive sugar intake is linked to a range of health issues, including obesity and chronic diseases.

Refined Grains: Refined grains, such as white flour and white rice, are avoided in favour of whole grains. These refined products lack the nutrients and fibre present in whole grains. 

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