Is this THE secret to dwelling an extended and wholesome life? The key ingredient eaten in Japanese villages the place most cancers is sort of non-existent

If there was a single cup you could sip on your way towards a longer, healthier life, it might just be a mug of turmeric tea.

In Okinawa, Japan – often referred to as the ‘Longevity Islands’ – turmeric is woven into daily life. The people here boast the highest concentration of centenarians recorded anywhere on Earth.

Research data suggests they not only live longer, but maintain remarkable clarity of mind and spirit well into advanced age. They are also known for being significantly disease free, allowing them to live life to the fullest.

So what exactly are they putting in their tea?

The golden root at the heart of longevity

Turmeric comes from a root, or rhizome, and naturally contains plant oils and active compounds like curcuminoids, which are associated with anti-inflammatory effects and antioxidants. 

Depending on the type of turmeric, around two to 12 per cent of that root is made up of essential oils.  

These ingredients give turmeric its vivid yellow colour, but they are also responsible for what studies describe as its ‘medicinal properties’.

Traditionally, the Okinawan diet is low in caloric density and red meat, and high in seasonal fruits and vegetables, fish, whole grains and lean proteins including soy. Turmeric fits seamlessly into the organic, plant-forward lifestyle.

What does the science say about cancer?

Curcumin, the active polyphenol extracted from turmeric, has been widely studied for its potential role in cancer treatment.

A 2021 review published by the National Center for Biotechnology Information described curcumin as having anti-inflammatory and anticancer properties.

Chronic inflammation is associated with the development of cancer, and curcumin has been known to significantly reduce it. It also plays a role in downregulating growth factors and signalling pathways involved in tumour development.

The review noted that curcumin targets multiple pathways involved in the initiation, development and growth of tumours, and that clinical trials have been completed or are ongoing for various types of cancer.

However, researchers stressed that further laboratory studies and human clinical trials are needed to determine the full mechanism of action and safety.

Research from Kyoto University in 2022 highlighted both the promise and the limitations of curcumin. While it has shown anti-tumour effects in preclinical models and has been used in cancer clinical studies, poor bioavailability and low stability have slowed its development as a drug.

Lead author Masashi Kanai noted that curcumin has long been used as a spice or food colouring, so minimal side effects would be expected.

Cancer Council Australia also acknowledges turmeric’s potential.

Laboratory studies on cancer cells have found curcumin can slow their growth, and some animal studies have shown it may slow the growth and spread of cancers.

However, there is not yet enough evidence of its effect in humans. Only small amounts of curcumin are absorbed when turmeric is eaten, and while it is safe in cooking in small amounts, the side effects of consuming it in large quantities for treatment or prevention are not well understood.

More research is needed, and Australians are advised to speak to their doctor before taking any herbs or supplements.

A daily ritual

For some, turmeric is already part of a modern wellness routine.

Nutritionist Devinder Bains told Vogue USA she had taken a daily dose of curcumin for more than three years and considered it as important as her multivitamin.

As someone who trains five or six times a week, much of it running, she said curcumin helped with joint health, reduced muscle soreness and aided recovery.

If she stopped taking it for a few days, she noticed soreness around her knees. She also found it beneficial for gut issues because of its anti-inflammatory properties.

But in Okinawa, turmeric is not isolated as a supplement – it is part of a broader lifestyle.

Other Blue Zone habits

According to Blue Zones research and Dan Buettner’s book Blue Zones: Lessons For Living Longer From The People Who’ve Lived The Longest, longevity in Okinawa cannot be reduced to a single ingredient.

Older Okinawans embrace an ikigai, a clear sense of purpose that gives them a reason to get up each morning and sustains roles of responsibility well into their 100s.

They rely on a predominantly plant-based diet built around stir-fried vegetables, sweet potatoes, and tofu, with pork eaten only occasionally and in small ceremonial amounts.

Soy plays a significant role, with tofu and miso soup forming dietary staples. Fermented soy foods contribute to a healthy intestinal ecology and offer additional nutritional benefits.

Gardening is common among centenarians too. Almost all grow or once grew a garden, providing daily physical activity and a steady supply of fresh vegetables.

Time outdoors also ensures regular sunlight exposure, supporting vitamin D production for stronger bones and healthier bodies.

Social connection is equally central. The tradition of forming a moai – a secure social network – provides financial and emotional support and the reassurance that someone is always there in times of need.

Okinawans also remain physically active well into old age. With minimal furniture in traditional homes and meals often taken seated on tatami mats on the floor, older residents rise and sit down multiple times a day, building lower body strength and balance that helps protect against falls.

Many also plant what Blue Zones describes as a ‘medical garden’. Mugwort, ginger, and turmeric are staples, all recognised for their medicinal qualities and consumed regularly as part of daily life.

Finally, there is attitude. A hardship-tempered outlook has given many Okinawans an ability to let difficult early years remain in the past while enjoying today’s simple pleasures. They have learned to remain likable, connected and engaged with younger generations.

Turmeric tea alone is unlikely to be a magic elixir. But in Okinawa, it sits at the centre of a lifestyle built on plants, purpose, movement, sunshine, and community. And that, rather than any single compound, may be the real secret to living to 100.