The J-shaped curve regarding alcohol consumption and life expectancy has been disproven
Recent genetic and Mendelian randomization studies have challenged traditional observational findings, providing strong evidence that the apparent J-shaped protective curve of moderate alcohol consumption is largely an artifact of residual confounding rather than true causality.
The retrieved papers include multiple recent reviews and genetic studies (e.g., Mendelian randomization) indicating that the traditional J-shaped curve showing cardioprotective or longevity benefits from light-to-moderate drinking is largely driven by residual confounding and abstainer biases, and that modern genetic evidence points instead to linear risks or accelerated aging from alcohol intake.
Alvarez-Mon MA, Martínez-Urbistondo D, Barbería-Latasa M, Vázquez-Ruiz Z, Ruiz-Canela M, Bes-Rastrollo M, Martínez-González MÁ. The Unfinished Debate on Wine and Other Alcoholic Beverages: Conflicting Evidence, Public Health Messages and the Missing Trial.. 2026. https://doi.org/10.3390/nu18030529
Highlights that Mendelian randomization studies challenge conventional observational findings by showing no health benefits and increased risks even at low alcohol doses.
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Iliakis P, Stamou E, Vakka A, Ntalekou K, Kouremeti M, Ktenopoulos N, Karakasis P, Theofilis P, Pitsillidi A, Sakalidis A, Dimitriadis K, Chrysochoou C, Tsioufis K. Alcohol Consumption and Acute Coronary Syndrome: Epidemiology, Pathophysiology, and Clinical Perspectives.. 2025. https://doi.org/10.3390/jcm15010299
Notes that emerging evidence from genetic data and Mendelian randomization has increasingly challenged the validity of the J-shaped relationship between alcohol consumption and acute coronary syndrome.
Wang B, He J, Pei Z, Tao C, Song E. Mendelian randomization and colocalization analyses reveal an association between diet consumption and altered telomere length in leukocytes.. 2025. https://doi.org/10.1097/md.0000000000045825
Provides genetic evidence that moderate alcohol consumption accelerates telomere shortening, contradicting previous observational claims regarding wine's protective components.
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