Fructose metabolism as a common evolutionary pathway of survival associated with climate change, food shortage and droughts.
Level 5 - mechanism / opinion, no new human data
Narrative review and evolutionary hypothesis with no original clinical data
PubMed 31621967 · doi:10.1111/joim.12993
What was done
This is a narrative review detailing the evolutionary and physiological roles of dietary and endogenous fructose metabolism as an adaptive survival mechanism during historical periods of climate change, food shortage, and drought.
What was found
The abstract provides no empirical numbers or quantitative data. It describes a mechanistic model wherein fructose—obtained dietarily or synthesized endogenously via the polyol pathway—promotes fat and glycogen storage, stimulates sodium retention, raises blood pressure, and shifts cellular energy production toward glycolysis to lower oxygen demand. These physiological effects are noted to be mediated in part by vasopressin and uric acid generation. The authors cite two historical mutation events (loss of vitamin C synthesis ~65 million years ago and uricase mutation ~12–14 million years ago) that amplified fructose-driven fat generation, arguing that excessive modern consumption of refined fructose drives obesity, diabetes, and hypertension.
Why it matters
It offers an integrative evolutionary framework to explain why modern metabolic pathways preferentially convert fructose to fat and drive metabolic disease in an environment of sugar abundance.
Limits
The publication is a non-systematic narrative review and conceptual hypothesis without new experimental measurements or clinical trials. Evolutionary claims regarding ancient mass extinctions rely on historical inference and cannot be directly measured or experimentally replicated.
Cited by
- supports The human body manufactures fructose via the polyol pathway, which is activated by hypoxia, elevated sodium, dehydration, and high glucose.