What do Blue Zones actually have in common?
When people talk about Blue Zones, they usually focus on diet, movement, and social connection. Sometimes red wine. All important. All well covered.
There is another shared factor that rarely gets attention: the water. Not just hydration, but what the water naturally contains.
Many Blue Zone regions sit on volcanic or mineral-rich geology, which means their groundwater naturally carries higher levels of silica, often in the form of orthosilicic acid (OSA).
This is not supplementation. It is background exposure: daily, lifelong, and completely unremarkable to the people drinking it. Over decades, that matters.
The five regions
| Region | Water source |
|---|---|
| Sardinia, Italy | Mountain spring water flowing through granite and volcanic rock, supplying naturally higher silica and trace minerals |
| Ikaria, Greece | Geothermal spring waters shaped by volcanic geology |
| Okinawa, Japan | Traditional water sources historically passing through mineral-dense volcanic soil |
| Nicoya Peninsula, Costa Rica | Hard groundwater rich in calcium, magnesium, and silica |
| Loma Linda, California | Earlier generations relied on mineral-containing regional groundwater before widespread modern filtration |
Different cultures. Different diets. A similar mineral background in the water.
Why does silica matter for longevity?
Orthosilicic acid is the bioavailable form of silica found in natural spring waters. It has been studied for roles in:
- Connective tissue and bone integrity
- Vascular health
- Aluminum handling, by reducing its bioavailability and supporting elimination
- Neurological research contexts, including work on aluminum's role in cognitive decline
The mechanism that matters most here is the aluminum one. Silicon binds aluminum to form hydroxyaluminosilicate, a compound the body can excrete through urine. That gives aluminum a route out that it otherwise largely lacks.
What pattern shows up most often on the OligoScan?
This is the part that moved silica from an interesting historical observation to something I look for on nearly every scan.
One of the most common patterns I see is low silicon paired with elevated aluminum.
That combination matters. Silicon helps maintain structural integrity in the body and plays a role in how aluminum is handled. When silicon is low and aluminum is high, the body is more likely to retain aluminum rather than eliminate it. That is a pattern that may quietly undermine long-term neurological resilience, connective tissue quality, and general robustness.
It also explains why the two readings should never be interpreted separately. A high aluminum reading on its own is one piece of information. A high aluminum reading alongside low silicon tells you something about capacity to clear it, which is a different and more actionable question.
How do you reintroduce silica intentionally?
We do not live in Blue Zones. But we can learn from them.
Three routes people use:
- Naturally high-silica mineral waters. Concentration varies enormously between brands and sources, so check the label rather than assuming.
- Stabilized orthosilicic acid supplements.
- Silica-rich water made at home. DIY directions are on the detox page under aluminum detox.
The goal is not excess. It is restoring a baseline that used to exist naturally in most drinking water, before modern filtration and treatment removed much of the mineral content along with everything else.
A DIY orthosilicic acid kit is available for $59 from Carolyn. Text or call 385-602-4452 to order. The kit makes approximately 60 gallons and comes with ingredients, measuring spoons, and laminated directions.
What this does not tell you
- Correlation is not causation. Blue Zone longevity involves diet, activity, social structure, genetics, and factors nobody has isolated yet. Silica is one shared feature, not an explanation.
- Water content varies widely. Do not assume your tap water or bottled water supplies a meaningful amount without checking.
- Testing shows patterns, not diagnoses. The low silicon and high aluminum pattern is a reason to look more closely, not a diagnosis of anything.
- Silica is not a treatment for any disease. Research into aluminum and neurological conditions is ongoing and not settled.
- More is not better. The aim is a baseline, not a large dose.
Go deeper
This article covers why silica matters and the low silicon plus high aluminium pattern. The full picture, including how silicon and aluminium are read together on a scan, and what other mineral pairings reveal, is in Dawn's forthcoming book on interpreting the OligoScan, written with Jeff Lioon Jr.
Join the launch list at oligoscanbook.com
References and further reading
- Crouse, Dennis N. Silica Water: The Secret of Healthy Blue Zone Longevity in the Aluminum Age. CreateSpace, 2018.
- Literature on orthosilicic acid bioavailability and connective tissue.
- Research on silicic acid and aluminum excretion via hydroxyaluminosilicate formation.
Related questions
- How does silica remove aluminum from the body?
- Where does aluminum exposure come from?
- Can you test for aluminum in the body?
- How do heavy metals block mineral absorption?
See what your own silicon and aluminum levels are doing. Book an OligoScan
Questions and Answers
Q: Does silica in drinking water help remove aluminum? A: Silicon binds aluminum to form hydroxyaluminosilicate, a compound the body can excrete through urine, which gives aluminum a route out that it otherwise largely lacks. Blue Zone regions sit on volcanic or mineral-rich geology and their groundwater naturally carries higher silica, usually as orthosilicic acid. Concentration varies widely between water sources, so ordinary tap water should not be assumed to supply a meaningful amount.
Q: What do Blue Zone regions have in common besides diet? A: Their water. Sardinia, Ikaria, Okinawa, the Nicoya Peninsula, and Loma Linda all historically drew drinking water from volcanic or mineral-rich geology, giving it naturally higher silica content. This is lifelong background exposure rather than supplementation, and it is a shared feature across regions with very different cultures and diets.
Q: What does low silicon with high aluminum mean on a mineral test? A: It is one of the most common patterns seen on the OligoScan. Silicon plays a role in how the body handles aluminum, so when silicon is low and aluminum is high, the body is more likely to retain aluminum rather than eliminate it. The two readings should be interpreted together rather than separately, because aluminum alone does not tell you about capacity to clear it.