The Mediterranean diet has been shown, unequivocally, to boost brain power, fuel metabolism and lower disease risk better than any fad on the market.
But there is another lifestyle that nutritionists are touting, endorsed by the World Health Organisation: the Nordic diet, reports the Daily Mail.
Based on produce from Scandinavia, an area rich in herbs, fish, root vegetables, berries and whole grains, the key that most excites nutritionists is the diet's emphasis on planning all your meals around vegetables, rather than adding vegetables to meat.
Nordics also learn to eat seasonal produce, which tends to be fresher with fewer additives.
Top nutritionists say the Nordic diet is, somewhat surprisingly, a good option for those on lower incomes: its primary vegetables (broccoli and cabbage) are usually affordable, canned fish counts, and so do frozen berries.
WHAT IS THE NORDIC DIET?
The diet is based on the Nordic region, emphasising winter vegetables, freshwater fish, and berries.
You are meant to get the majority of calories from vegetables, then add other things - like eggs, meat, or fish - in moderation as an aside.
It follows the Baltic Sea Pyramid.
The pyramid lays out the essential principles of the Scandinavian lifestyle in order of priority - starting from its broad foundation at the bottom, going up to its small tip.
At the best is exercise and the value of eating meals with others.
Next is leafy greens, legumes, vegetables, whole grains and healthy fats.
After thyoghurtseafood, then poultry and eggs and cheese and yogurt, then finally meats and sweets.
A little wine here and there is fine, though that sits at the top too, and plenty of water is encouraged.
HOW DOES IT COMPARE TO THE MED DIET?
The two diets are very similar.
They champion vegetables, legumes, fruits, and whole grains, and healthy fats.
The clearest difference is in the oil: olive oil is the core of the Med diet, while canola oil (also known as rapeseed oil) is the heart of Nordic cuisine.
There are pros and cons to both. Olive oil has more antioxidants, but more saturated fats.
"Just like olive oil, canola oil is high in monounsaturated fats, but it has a higher amount of polyunsaturated fats than olive oil," Amy von Sydow Green, MD, a nutritionist at Penn Medicine, and a proud Scandinavian, told Daily Mail Online.
"Olive oil has a higher antioxidant level, which would make it a good oil to keep in rotation even if you're transitioning to Nordic diet principles.
"It's important to know that canola oil has a higher smoke point than olive oil (200C/400F vs 160C/320F), so go for canola when you're cooking at high heat, to avoid the development of free radicals and toxic compounds."
The other main difference is that Nordic food is geared towards colder climates, than warmer ones.
"The Nordic diet is based on foods that grow better in colder climates," Green explained.
"That means, for example, it is high in kale, cabbage, Brussels sprouts and root vegetables, rather than tomatoes and peppers."
4 NORDIC RULES TO IMPROVE YOUR DIET
1. Pick the veg first
In the Nordic diet, vegetables are the star of the show on the plate.
A lot of people tend to put the meat, fish or starchy element (like pasta) first, and dress it up with vegetables - or leave vegetables out completely.
In fact, only 58.8 per cent of Kiwi males and 49 per cent of Kiwi females are eating three or more servings of vegetables a day, according to a 2015-2016 NZ Health Survey.
2. Get to know what's in season
These days, we can get most foods year-round, if we go to the right places.
Seasonal food, in theory, is grown, picked and sold at the peak of its season.
That means it tends to retain most of its health benefits, and has fewer growing agents.
It is also at the peak of its supply, so it is cheaper for farmers - and, therefore, cheaper for you.
3. Learn what 'processed' means - and cut it out completely
Apple juice. White bread. Chips. Cereal. Microwave meals.
Those are all processed foods - as in, their nutrients have been diluted down.
In Nordic food, emphasis is put on eating real apples, whole grain bread, nuts and seeds, oats, and freshly-cooked meals.
4. Embrace fermented foods
Scandinavia is known for its fermenting. The first evidence of fermenting was found on the east coast of Sweden some time between 3000 BC and 6000 BC.
And it is still going strong.
From pickled fish to fermented dairy, there is an abundance of options.
Sweden has a kind of fermented milk called filmjölk, which is similar to yoghurt.
In Iceland, there is a near-identical product called skyr.
In America, options include sauerkraut (pickled cabbage), pickles (pickled cucumber), kefir (fermented dairy), kombucha (fermented tea), miso (fermented soybean, barley and brown rice), tempeh (fermented soybean), and yoghurt.
WHY THIS DIET - OF FISH AND FRESH PRODUCE - DOES WORK ON A BUDGET
1. Seasonal is cheaper
"Seasonal produce is usually less expensive than fruit and veggies not in season," von Sydow Green explained.
"The winter vegetables emphasised in the Nordic diet are often quite affordable: kale, cabbage and broccoli for example."
2. Make a beeline for the freezer
"Frozen vegetables and berries are a great choice, make sure you get the kind without anything added.
"In the summer, berries are often on sale, get some and freeze!"
3. Canned fish counts
Canned fish like salmon, herring, mackerel and sardine are great choices. They will provide the healthy omega 3 fats you need for a low price. Frozen fish is a great choice as well.