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Gerald Pollack

An icebreaker

A bioengineering professor argues that water next to certain surfaces organizes into a distinct, ordered fourth phase he calls EZ water, with wide-ranging effects in biology. The core finding is real; his sweeping explanations for it remain contested by other scientists.

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Worth knowing · 1 of 5
What is EZ water, exactly?
Next to certain water-loving surfaces, water molecules appear to reorganize into an ordered, charge-separated layer that pushes out dissolved particles. Several independent labs have confirmed the layer itself exists.
Worth knowing · 2 of 5
What claims does he make beyond the basic observation?
He proposes this water layer explains cell hydration, blood flow, and even how living systems generate usable energy, positioning it as a fourth phase of water itself. Those broader claims go well past what most researchers accept.
Worth knowing · 3 of 5
What do critics say the layer actually is?
A detailed review paper found the exclusion effect is real but argued it's better explained by ordinary particle movement near a surface than by a new structural phase of water. It called some of his broader claims physically implausible.
Worth knowing · 4 of 5
Has this idea led to commercial products?
Yes — bottled 'structured water' and related devices are sold partly on the back of this research, well ahead of any settled scientific consensus. The science and the marketing are worth keeping apart.
Worth knowing · 5 of 5
Is this considered mainstream science today?
It sits in a genuinely contested middle ground — published, peer-reviewed, and decorated with a real scientific award, while still rejected by many specialists on its larger claims. Both things are true at once.
Words to know
Exclusion zone (EZ)A layer of water next to a surface that appears to push out dissolved particles and microspheres.
Fourth phaseHis proposed name for this ordered water state, alongside solid, liquid, and vapor.
DiffusiophoresisAn established physical process critics point to as a more conventional explanation for the exclusion effect.
More words
Structured waterA commercial term for water claimed to carry this ordered structure, sold without settled scientific backing.
A voice · 1 of 3
Gerald Pollack · Bioengineering professor who proposed the theory

He argued water next to hydrophilic surfaces reorganizes into an ordered, charge-separated fourth phase, publishing the claim in a 2013 book and later research. He proposed this water layer helps power basic processes throughout living cells.

A voice · 2 of 3
Daniel C. Elton · Physicist who led a critical review

With colleagues, he published a detailed 2020 review confirming the exclusion effect is real but arguing conventional particle physics explains it better than a new phase of water. He called several of the broader biological claims physically implausible.

A voice · 3 of 3
Martin Chaplin · Water scientist who reviewed the structure claim

Running a long-standing reference site on water science, he argued that Pollack's proposed structure for EZ water doesn't hold up physically, while accepting that the exclusion effect itself is real.

A line to leave them with
The water does something strange near a surface. What it means is still being argued.
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