Research Article Summary
• Critique of traditional dose–response models: The article challenges the dominance of the linear no-threshold (LNT) model in toxicology and radiation risk assessment, arguing that assuming “any dose is harmful” lacks biological justification and may mischaracterize low-dose exposures across chemicals and radiation alike.
• Thresholds and hormesis: The authors emphasize that many biological systems exhibit threshold behavior and adaptive responses at low doses — meaning that below a certain level, organisms can effectively neutralize or repair insults, and in some cases low doses may even stimulate beneficial biological processes (a concept known as hormesis).
• Implications for environmental safety: Rethinking dose–response analysis has practical consequences for environmental standards: if thresholds and adaptive mechanisms are ignored, regulators may overestimate risks, leading to excessively conservative cleanup standards and misallocated resources.
• Cross-disciplinary parallels: The article draws parallels between ecotoxicology and radiation biology, noting that both fields deal with low-dose exposures in complex living systems and that rigid application of LNT may obscure real biological responses and adaptive capacities in both domains.
• Calls for modernized frameworks: The authors argue for updated dose–response frameworks grounded in mechanistic biology, empirical data, and systems biology, rather than default mathematical extrapolation from high doses — especially when evaluating real-world low exposures in environmental, clinical, or occupational settings.