It's a global health fad with millions of fans in US and Europe, and yet in Greece, many people have never heard of 'Greek yoghurt'.
Equally surprising in an age when billions are spent on marketing, the term 'Greek yoghurt' is basically a quirk of fate.
"What is known abroad as 'Greek yoghurt' is called 'straggisto' (strained yoghurt) in Greece," explained Prokopis Ploumbis, a cheesemaker in the rural outskirts of Athens.
"The secret lies in the milk," he adds.
Creamy, rich in protein and low in fat, strained yoghurt made from cow's milk is increasingly prized by health-conscious consumers, and it has benefited from the growing popularity of the Mediterranean diet in the Western world.
And yet, in terms of marketing, neither the Greek state nor any Greek company had sought to stamp a patent on the product, unlike feta cheese which is now a protected EU term.
No court would have accorded protection for 'Greek yoghurt' when the term is not even used in Greece.
It thus lay open for the taking.
- Shepherding the crowds -
Sensing an opportunity, Turkish entrepreneur Hamdi Ulukaya was able to make a killing on the American market with his yoghurt company, named Chobani, which comes from the Turkish word for shepherd.
It is also similar to the Greek word for shepherd, and Chobani packages prominently call it 'Greek yoghurt' in the United States.
Meanwhile the Greek company that first broke open the US and European markets decades ago, Fage, features 'Greek strained yoghurt' in smaller type on its packages.
In just seven years, Chobani's 'Greek yoghurt' has become the best-selling yoghurt brand in the United States, and strained yoghurt now accounts for 35 percent of the US yoghurt market, from only four percent in 2008.
"Because it was introduced in this country by a Greek company, they called it 'Greek yoghurt.' It doesn't matter whether it's Greek yoghurt or Turkish yoghurt, as long as it's a good yoghurt," Ulukaya told Fortune magazine in 2011.
Fage fought back.
"Fage is the one that made known to the world the creamy texture of Greek yoghurt, its protein concentration, its rich taste," said the company's commercial director Alexis Alexopoulos.
However the 88-year-old Athens-based family company, which exports dairy products to 40 countries, eventually had to concede defeat in the United States.
But it moved to protect its 95-percent share in the British market.
In British courts, Fage based its argument on the fact that unlike Chobani, its yoghurt is actually made in Greece, and won the case on appeal in January.
Chobani now markets its yoghurt as 'strained' in Britain, and 'Greek' in the United States.
Fage sells its product in Britain as 'authentic Greek yoghurt'.
- Cow or sheep? -
Strained yoghurt is also popular in Greece, where it also serves as a key ingredient for staple dishes like tzatziki dip.
But for traditionalists, there is also a significant yearning for non-strained, tangier and more fatty yoghurt made from sheep's milk.
Yoghurt made from sheep's milk has 6.5 percent natural fat, compared to around 2.0 percent in cow's milk.
All over the country there are hundreds of traditional yoghurt-makers catering to the countryside or island markets.
Many of these products are consumed locally and never reach the big supermarket chains in Athens.
"Greek ewes graze in the mountains and receive no additives in their food," said Ploumbis, the cheesemaker in Vilia, some 60 kilometres (37 miles) west of Athens.
"The best milk comes in the spring. The animals eat hundreds of different plants, it's an unimaginable richness," he added, pointing to the valley around the sheep pens, covered in shrubs and almond trees in bloom.