Examining the three dietary principles of the “Power of 9” reveals significant overlaps with the Mediterranean diet. This plant-heavy diet is carbohydrate-rich, low in sugar, and features modest portions of proteins like meat, dairy, and fish a few times a week (3-4 oz servings). Daily legume consumption, especially lentils, is recommended. Drink options are limited to tea, coffee, water, and moderate wine intake.
Yet, the Blue Zone Diet extends beyond food selection; behavioral principles like Hara hachi bu (eating to 80% fullness) and having the last meal in the late afternoon/early evening are key, reducing overall caloric intake (Blue Zones, 2015).
Blue Zone Diet Meal Plan
The Blue Zone Diet is 95% plant-based which includes fresh vegetables, fruits, and whole grains. There are certain foods that are staples of this dietary practice:
- Leafy greens (examples include kale, spinach, collard greens, chard, and turnips)
- Daily consumption of beans (examples include lentils, garbanzo, white beans, and soybeans)
- Two handfuls of nuts daily (examples include almonds, cashews, walnuts, and Brazil nuts).
- Whole grain or sourdough breads
- Consumption of mostly whole foods. This means consuming the entire food item as opposed to parts of it (i.e., whole milk, fruits, vegetables, or eggs). Food processing should be limited to simple cooking, grounding, or fermenting.
(Blue zones, 2015)
Produce
Any fruit or vegetable is permitted on the Blue Zone Diet, but some examples of common produce items include:
- Leafy greens (spinach, collard greens, kale, chard)
- Legumes (green peas, lentils, lima beans, kidney beans)
- Seasonal fruits (blueberries, cherries, avocados, melons, grapes, etc.)
- Potatoes and tubers (Yuca, sweet potato, potatoes)
Some tasty dishes that follow Blue Zone Diet guidelines can include stuffed tomatoes, lentil soups, salsa, oatmeal, gazpacho, tofu stir-fry, baked chickpeas, and vegetable stews. These dishes are primarily plant based, colorful, high in fiber, and extremely nutrient dense. Dan Buettner, investigator that is credited with discovering the blue zones provides an excellent reference for Blue Zone Diet recipes: Recipes – Dan Buettner (Buettner, 2023).
Protein
The Blue Zone Diet is considered a moderate protein diet. Though meat, dairy and fish are acceptable in moderation on the blue zone diet, most protein sources should be plant-based (Nieddu et al., 2020) when it comes to Blue Zone Diet recipes.
Some examples of plant-based proteins include:
- Tofu
- Beans (garbanzo, lentil, black, white, soybeans, or any variety)
- Nuts (walnuts, Brazil nuts, almonds, cashews, etc.)
- Peas
Blue Zone Diet recipes should emphasize moderate protein intake. While recommended foods like beans and nuts may not be complete proteins or very high in protein, they can be complemented by occasional consumption of eggs, dairy, meats, and fish. Plant-based protein sources include black bean burgers, tofu stir-fry, lentil soups, chickpea “meatballs,” and quinoa salads (Buettner, 2023).
Grains
Grains are a large part of the Blue Zone Diet; however, consumption of grains is limited to whole grains such as oats, barley, corn, whole grain pastas, brown rice, and quinoa. Wheat is part of the Blue Zone Diets, but processing of such is minimal. Some examples of grain choices compatible with a Blue Zone Diet include:
- Whole grain or sourdough bread
- Whole grain pasta
- Barley
- Oats
- Quinoa
- Corn
An interesting fact about some of the blue zones is that sourdough bread seems to be a dietary staple, especially blue zone map areas like in the region of Ikaria, Greece. The process of producing sourdough bread reduces the number of sugars (lowering the glycemic index) and gluten in bread. Sourdough proves to be a healthy grain-based option that pairs well with many blue zone-approved soups and stews.
Other grain dishes that can be included in Blue Zone Diet recipes include oatmeal and fruit, cornmeal waffles, blueberry muffin energy bites, and pasta with tomato and basil. For a complete list of blue zone-friendly recipes, visit Recipes – Blue Zones (Buettner, 2023)
For more information on the Blue Zones, check out the Random Fit podcast, Blue Zones: Live Long & Prosper.
Foods to Avoid in the Blue Zone Diet
The health benefits of Blue Zone Diet recipes are closely tied to avoiding certain foods. Limiting or eliminating foods high in sugar, heavily processed items, and those rich in saturated fat is crucial. Such foods are highly palatable, encouraging overeating, and can contribute to weight gain and inflammation, promoting chronic diseases like diabetes, heart disease, and cancer—not conducive to achieving longevity.
Now that we have reviewed what TO EAT on the Blue Zone Diet, let’s look at some foods to avoid:
- Highly refined cereals, breads, and pastries (cookies, cakes, breads, donuts, etc.)
- Meats high in saturated fats
- Butter and many cooking oils
- Fast foods or highly processed meals (frozen dinners, etc.)
- Highly processed snack foods (chips, candy, protein bars)
- Drinks with added sugars such as fruit juices or sodas
(Nieddu et al., 2020)
Criticism of the Blue Zone Diet
It’s crucial to note that correlation doesn’t always imply causation. Studies proving the blue zone’s “Power of 9” impact on longevity are limited, with only three recommendations related to diet. The dietary practices are dynamic and challenging to attribute solely to longevity. Validation of ages in blue zone studies relied on self-report, and statistical analyses were imperfect.
While well-validated recommendations exist, high-protein intake may be challenging, especially for athletes. Despite this, a blue zone diet, combined with exercise, sleep, self-care, and stress reduction, likely offers more benefits than drawbacks (Pes et al., 2022).
In my talks with Grandpa Joe, he mentions including many of these dietary practices—especially the frequent consumption of fruits, whole grains, and fresh vegetables. However, he also commits to daily movement, quality sleep, and spending plenty of time outdoors and with friends and family. Plus, I have personally witnessed him eating cookies for lunch on more than one occasion. Overall, he has likely incorporated about 80 percent of these dietary practices in his nearly 94 years of life. Perhaps that is a reasonable strategy to follow for most of us.
