Japan tops the world in estimated daily per-capita fermented food consumption, highlighting the enduring role of traditional diets in modern nutrition as scientists continue to explore the health benefits of fermented foods.

According to data compiled from Fermented Food Consumption Analysis, Public Health Nutrition (2024), PubMed Central , and other academic sources, the average person in Japan consumes approximately 360 grams of fermented foods daily, placing the country ahead of South Korea, Ethiopia and several Nordic nations.

Japan's leadership reflects the widespread use of fermented ingredients in everyday meals. Common staples include miso, soy sauce and katsuobushi, all of which are produced through fermentation processes that have been refined over generations.

South Korea ranks second with an estimated 290 grams per person daily, driven largely by the country's famous fermented dishes such as kimchi, doenjang and gochujang. Kimchi alone is consumed regularly by a majority of South Korean households and is widely regarded as a cornerstone of the national diet.

Indonesia rounds out Asia's representation in the top ten with approximately 175 grams per day, supported by traditional foods including tempeh, tape and oncom.

Outside Asia, Ethiopia stands out with an estimated daily consumption of 280–310 grams, reflecting the importance of fermented staples such as injera , the country's iconic sourdough flatbread, as well as traditional fermented beverages including tej and borde.

Northern Europe also performs strongly. Iceland ranks fourth at around 270 grams per day, while Finland and Denmark share fifth place with 260–270 grams daily.

In these countries, fermented dairy products play a central role. Foods such as skyr, viili, piimä and kefir have been consumed for centuries and remain popular components of everyday diets.

Bulgaria, Turkey, Russia, Ukraine, Georgia and Armenia all feature prominently in the ranking, reflecting the region's longstanding relationship with fermented milk products and preserved foods.

Bulgaria records approximately 230 grams daily, supported by its globally recognised yoghurt culture. Turkey follows with around 200 grams, where yoghurt, ayran and tarhana continue to be dietary staples.

Meanwhile, Russia and Ukraine average about 190 grams, with foods such as ryazhenka, smetana and pickled vegetables remaining common household items.

Growing consumer interest in gut health has brought renewed attention to fermented foods. Research published in journals including Public Health Nutrition and studies indexed by PubMed Central suggest that fermented foods may contribute beneficial microorganisms and bioactive compounds that support digestive health and microbial diversity.

A widely cited Stanford University study found that diets rich in fermented foods were associated with increased microbiome diversity and reduced markers of inflammation in healthy adults.

Researchers caution, however, that the health impact of fermented foods can vary depending on the type of food, preparation methods and overall dietary patterns.

Hundreds of supporters gathered at Roland Garros on Tuesday to back the 19-year-old as he faced Czech player Jakub Mensik on Court Philippe Chatrier.

Although Fonseca lost the match in straight sets, fans said his performance throughout the tournament had given Brazilian tennis a new figure to rally behind.

"We are very excited about Fonseca. It had been many years since we had someone like him representing our nation, going to the main court, representing the country. He will get there, God willing," one supporter said.

Another fan described the teenager as a source of hope for Brazilian sport .

"He's the sport's hope for our country. Our country lacks an idol in sports , so we are cheering for Fonseca to be a Roland Garros champion," the fan said.

Much of the excitement followed Fonseca's impressive tournament run, including his victory over three-time Roland Garros champion Novak Djokovic.

"I had the privilege of seeing Fonseca win a match, even against the Pele of tennis, which is the invitation. So, very happy, let's go," a supporter said.

For some fans, Fonseca's progress was enough reason to make a return trip to Paris.

"Amazing. We were at home at Rio, and we were like, oh, I have to go back to Roland Garros. And now we are here," another fan added.

Fonseca was beaten 4-6, 3-6, 6-7 by Jakub Mensik, who advanced to the semifinals to face second seed Alex Zverev.

Despite the defeat, Fonseca became the first seeded Brazilian player in the men's singles draw since 2011 and the first teenager to defeat Novak Djokovic at a Grand Slam.