Nutritionists around the globe say that healthy eating means consuming the right foods from all food groups.

But, with new diets constantly trending,  it can be difficult to know what we should be doing. More often than not, we find ourselves jumping from one diet to another just to see how it works.

One of the biggest reported concerns is that we put to much focus on the word “diet”, instead of looking at the food we eat within the course of a day, a week or a month period. This way it would become a lifestyle, rather than a diet.

Celebrity trainer, nutritionist, author and television host, Harley Pasternak who is known for his books The Body Reset Diet and The 5-Factor Diet, recently travelled to the healthiest countries to learn about what these eating plans work.

Longevity takes look at the science and research:

The Mediterranean Diet

The Mediterranean diet

A traditional Mediterranean diet, eaten by people in Greece, Italy and Spain, emphasizes seasonality, local produce and traditional preparations. Meals are often community or family events.

The focus of the Mediterranean diet isn’t on limiting total fat consumption, but rather on choosing healthier types of fat. It discourages saturated fats and trans fats, both of which contribute to heart disease and other non-communicable diseases.

Scientifically speaking

Recent research published by The Mayo Clinic has shown that the traditional Mediterranean diet reduces the risk of heart disease by a good margin. In fact, an analysis of more than 1.5 million healthy adults demonstrated that following a Mediterranean way of eating was associated with a reduced risk of death from heart disease and cancer, as well as a reduced incidence of Parkinson’s and Alzheimer’s diseases, possibly due to the inclusion of healthy omega fats. The Dietary Guidelines for Americans recommends the Mediterranean diet as an eating plan that can promote health and prevent disease. And the Mediterranean diet is one your whole family can follow for good health.

Professional Opinion – According to Melissa Kelly, founder of Scoop to Lose, the Mediterranean diet is in line with every sound nutritional opinion there is. “The eating plan promotes long-term weight loss and better health, and allows you to eat your favourite foods in moderation,” she says. Because the diet includes food groups such as fruits, vegetables, whole grains, lean protein and low-fat or fat-free dairy products, you are able to have sustained weight loss and health over a longer period of time, in comparison with quick-fix, fad diets. Registered dietician Celynn Erasmus adds that the Mediterranean diet is a great way to ensure you increase your nutrient intake, as well as reduce your chances of suffering from a chronic disease.

New Nordic Diet


Scientists designed this diet to contain 35 percent less meat than the average Danish diet, more whole grains and locally sourced produce and more than 75 percent organic produce. Called the New Nordic diet, it’s similar to the Mediterranean diet in that there is a big emphasis on whole grains, fruits, vegetables, eggs, oil and seafood, while foods like meat, dairy, dessert and alcohol are eaten sparingly.

The New Nordic Diet was developed in 2004, when food professionals and chefs from the five Nordic countries met in Copenhagen to define a new regional cuisine, which, in contrast to traditional eating habits, would be healthier. Though the recent trend of Nordic-inspired restaurants, such as Noma in Copenhagen and Acme in New York City, is to incorporate complex cooking methods and charge high prices, the basic diet is simple and affordable, emphasizing seasonality and sustainability of ingredients, avoidance of food additives and minimisation of waste.

Rich in plant foods (often foraged), the diet includes lots of root vegetables, cabbage (and other crucifers), dark greens, apples and pears, berries (such as ligonberries and bilberries) and whole grains (such as rye and oats). Fish (such as salmon and herring) is also prominent, along with some wild game (such as elk, inherently low in fat) and small amounts of dairy. Other wild foods include moss, mushrooms, nettles, garlic and even ants. Fresh herbs include dill, chives and fennel.

Scientifically speaking – Several studies, such as one published in the Journal of Internal Medicine in 2013, have found that the New Nordic Diet improves blood cholesterol levels in people with cardiovascular risk factors, compared to the usual Nordic diet or a typical Western diet. And some (but not all) studies have found that the diet lowers blood pressure and improves insulin sensitivity. Being on the diet for just 6 to 18 weeks has been found to have benefits.

Interestingly, in two studies (including one published this year in the American Journal of Clinical Nutrition), people on the diet lost significant weight, though they weren’t told to restrict calories, which indicates that they felt satisfied. Another study found that people who ate six characteristic foods of the diet had a lower risk of premature death over 12 years.

Traditional Okinawa Diet

Traditinal okinawa diet

This low-calorie yet nutrition dense diet is big on fruits and vegetables but sparse when it comes to meat, refined grains, and sugar, salt and full-fat dairy.

Reports suggest that, on an average, a typical Okinawan may live to around 110 years. This is partly because of their genetic make-up. However, recent community research studies on Okinawa population suggest that the most important factor influencing their longevity is the simple food they eat.

Scientifically speaking– The diet of the Okinawan people is 20% lower in calories than an average Japanese consume. Their diet consistently averaging no more than one calorie per gram and the average Okinawan has a BMI (Body Mass Index) of 20. It has been widely recognized that the food consumed itself contains more free-radicals than through the external agents like bacteria, viruses, etc. Calorie restriction, therefore, thought to improve health and slow the aging process in some animal models like rodents by limiting their dietary energy intake below daily-average needs.

The Okinawa diet is low in fat and has only 25% of the sugar and 75% of the grains of the average Japanese dietary intake. Low-fat and limited sugar in the diet can definitely help prevent coronary heart diseases and stroke risk.

Traditional Asian Diet

Traditional Asian food

There isn’t really one traditional Asian diet, but a group of international nutritionist collaborated together in the 90’s to come up with an Asian Food Pyramid. It prioritizes rice, noodles and whole grains, as well as fruits, vegetables, legumes, seeds and nuts as the most-eaten food groups. Fish and shellfish are optional daily choices, while eggs and poultry should be eaten weekly.

Scientifically speaking – Asian countries have less incidences of obesity, cardiovascular disease and metabolic diseases like diabetes than Western countries, although that seems to be slowly changing thanks to rising economies and urbanization. One Harvard nutrition researcher notes that high-carb, high-glycemic aspects of a traditional Chinese diet are colliding with an increasingly urbanized, inactive lifestyle to create an “emerging public health dilemma.”

Asian diets are low in fat, especially the saturated variety, and high in fibre, due to an emphasis on fruits and veggies, whole grains, and rice. And they’re in line with the medical community’s widely accepted definition of a heart-healthy diet that keeps cholesterol and blood pressure in check and heart disease at bay.

French Paradox Food

French Paradox food

Scientists are kind of scratching their heads at this one. The French have some of the lowest obesity rates in the developed world and highest life expectancies, despite the rich food they eat. Their dishes include full fat cheese and yoghurt, butter, bread, and small but regular amounts of cheese and chocolate are some of the hallmarks of this rich diet.

Scientifically speaking –  Scientists haven’t found a definite answer to why French people are amongst the most healthiest and live the longest but they reckon it could be their regular intake of wine.

The French Paradox was first noted by Irish cardiologist Samuel Black in 1819. He found that the French had lower heart rate deaths compared to the Irish and attributed this to ‘the French habits and modes of living, coinciding with kindliness of their climate and the peculiar character of their moral affections’. This was the beginning of more current thinking that other dietary and lifestyle factors may play a part in the risk for heart disease.

It was not until the 1990’s that the French Paradox was looked at again. Dr Serge Renaud, a scientist from Bordeaux University in France, coined the term ‘French Paradox’ after his 1992 study. This was a large study of middle age French men. He found they have a long life expectancy despite a diet high in saturated fat. Although the diet included butter, cheese, eggs and cream, contributing to 15% of calories from saturated fats, the incidence of CHD was only 40% of the American incidence of CHD. He concluded that two to three glasses of wine a day wine reduced death rates from all disease by up to 30%, but four glasses a day were found to have an adverse effect on health. He suggested that the combined effect of the alcohol and antioxidants in wine played a role in reducing CHD. The French Paradox became internationally recognized when in 1991 he, together with another French Paradox supporter Dr R Curtis Ellison of Boston University School of Medicine, outlined the research on the ‘60 minutes’ documentary in the USA.

Pasternak reckons the biggest error other countries make when it comes to maintaining a healthy lifestyle is eating bigger portions than what they actually should be eating.

So the answer to the question at hand, which is, what the world’s healthiest diets have in common- is quite simple.

These diets incorporate the essential  five main food groups which are:

*Whole grains

*fruit and vegetables


*fat & sugar.