Introduction
Western societies are experiencing a worrying increase in chronic diseases, the causes of which are difficult to explain based on traditional theories. This analysis examines the available epidemiological data and explores alternative hypotheses concerning contemporary nutritional factors.

Unprecedented epidemiological growth

Statistical data reveal a profound transformation in the health profile of populations over a single generation. Certain pathologies show remarkable growth rates: fibromyalgia has seen a diagnostic increase of more than 7,000%, while bipolar disorder in young people has increased by 10,833%. Even for more common conditions such as diabetes, there has been a 305% increase.

This trend extends across the entire spectrum of autoimmune and metabolic diseases, suggesting a systemic change rather than isolated variations. The magnitude of these figures raises fundamental questions about the determinants of health in contemporary societies.

Analysis of conventional risk factors

Smoking
Tobacco, long identified as a major risk factor, presents a paradoxical trend. Public health campaigns have been highly successful: smoking prevalence has declined by more than two-thirds since the 1950s, from around 50% to significantly lower levels. However, this decline coincides with an increase in chronic diseases, suggesting an inverse correlation to the expected causality.

Physical activity
Contrary to the hypothesis of increasing sedentarization, data from the last three decades show an increase in physical activity. The proportion of individuals complying with official exercise recommendations has risen from 44% to 54%. Although physical activity remains a recognized protective factor, its increase does not explain the observed deterioration in overall health.

Traditionally blamed eating habits
Nutritional recommendations in recent decades have targeted several foods: red meat, animal fats, and sugars. Consumption data from the United States and Switzerland indicate significant adherence to these guidelines. Consumption of red meat and animal fats has declined, while sugar consumption has been falling for 25 years. This compliance with official recommendations, in the absence of a corresponding improvement in health, suggests that other factors are involved.

An alternative hypothesis: industrial vegetable oils
Analysis of positive dietary changes (what has been added rather than removed) reveals a remarkable correlation between the explosion of chronic diseases and the increase in consumption of industrial vegetable oils and seeds (canola, soy, corn). In the United States, consumption of these products has nearly tripled since the 1960s, representing a major transformation in the food supply.

Evolutionary and historical perspective

The ancestral diet
Of the 150,000 generations that make up human history, more than 99% have been characterized by a relatively stable diet, heavily based on animal products. Our physiology and genetics have developed in adaptation to this nutritional model.

The agricultural revolution
Paleopathological archives document the consequences of the first major dietary transition. The introduction of agriculture around 10,000 years ago was accompanied by observable physiological changes in skeletons: reduced stature, decreased brain volume, and the appearance of early pathologies such as osteoporosis and dental caries.

The industrial revolution
About 150 years ago, a second dietary shift occurred with the widespread introduction of refined flours, concentrated sugars, and, more significantly, industrial vegetable oils. These products, which had been absent or marginal in the human diet until then, were incorporated in increasing quantities.

The post-1960 era
The 1960s marked a turning point with the widespread adoption of official recommendations advocating the replacement of traditional animal fats with industrial vegetable oils. This period coincided precisely with the exponential acceleration of chronic diseases.

Conclusion

An examination of epidemiological data reveals a mismatch between traditionally cited risk factors and the actual progression of chronic diseases. At the same time, the recent introduction of industrial vegetable oils into the human diet shows a remarkable temporal correlation with the current health crisis.

This analysis raises a fundamental question: to what extent could the divergence between our genetic heritage, shaped by millennia of adaptation to a specific diet, and the sudden dietary changes of the industrial era explain the current prevalence of chronic diseases?

If the modern diet, characterized by recent industrial innovations, is indeed a pathogenic factor, then nutritional recommendations should be reconsidered in light of our ancestral dietary heritage. Although this hypothesis runs counter to established consensus, it warrants rigorous scientific investigation given the considerable public health implications.