Ben Greenfield on health: what the evidence says · JRE #1069
SUBJECT: HEALTH
The short answer
Greenfield cites Dr. Gerald Pollack's research on 'exclusion zone' (structured) water in vessels and plants as the basis for claiming that 'structuring' drinking water improves cellular hydration. Gerald Pollack, a biomedical engineer at the University of Washington, has published peer-reviewed work, including a 2024 study in Scientific Reports, documenting a real, reproducible phenomenon: a particle-free "exclusion zone" (EZ) that forms in water near certain hydrophilic surfaces, including plant xylem vessels.
Not a true/false call. Every claim is logged with its sources; read the exhibits below.
there's this cat up at University of Washington named Dr. Gerald Pollack, and he has done this research that shows like in plants or vessels, like blood vessels, for example, there's an exclusion zone of water.
What the evidence says 01 / RECORD
Gerald Pollack, a biomedical engineer at the University of Washington, has published peer-reviewed work, including a 2024 study in Scientific Reports, documenting a real, reproducible phenomenon: a particle-free "exclusion zone" (EZ) that forms in water near certain hydrophilic surfaces, including plant xylem vessels. The existence of this exclusion zone near materials like Nafion has been independently replicated by multiple laboratories. However, Pollack's further claim that EZ water constitutes a distinct, more-ordered "fourth phase" of water with altered molecular structure is disputed among physical chemists; a 2020 critical review in the International Journal of Molecular Sciences found the experimental evidence (including birefringence measurements) does not support a genuine phase change and argued that conventional mechanisms, such as diffusiophoresis, better explain the observations. Critically, no controlled human studies show that passing tap water through a "structuring" device changes its biological hydration properties inside the human body; water crosses cell membranes via aquaporin channels on femtosecond timescales, a mechanism unaffected by any claimed pre-treatment "structuring." Even Pollack himself has publicly stated skepticism toward commercial "structured water" products, saying he has "yet to see the demonstrated evidence" that such devices produce what they claim. The claim therefore selectively cites a narrow, real physical observation to support a much broader and unsupported commercial health claim.
Who Benefits
Ben Greenfield promotes and sells 'structured water' devices tied to the exclusion-zone/EZ water concept, including through his family-run company Greenfield Water Solutions (Vortexer, Harmonizer) and the Quad Flow Hydro Energizer sold on his own website, both with affiliate discount codes, giving him a direct financial interest in promoting the underlying EZ-water framework.