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This essay examines how interventions that slow aging, such as reducing nutrient signaling pathway activity, can have lasting effects on health even when applied only temporarily during early adulthood, creating a form of "physiological memory." The authors argue that understanding the biology of aging requires examining health determinants across the entire lifespan, not just in old age, as human epidemiological studies show that late-life health is significantly influenced by earlier environmental exposures including diet. This perspective suggests that the timing of anti-aging interventions throughout life may be as important as the interventions themselves.
Why it matters
This framework could reshape approaches to preventing age-related diseases by identifying critical windows earlier in life when interventions might have maximal long-term benefits. Understanding physiological memory mechanisms may lead to more effective and practical strategies for promoting healthy aging that don't require continuous intervention throughout life.
by Sara Alam, Linda Partridge, Nazif Alic
Globally, the growing proportion of older individuals is imposing personal and societal costs. However, interventions that slow aging are possible; for example, dampened nutrient signaling pathway activity in animal models promotes better health later in life. Recent findings indicate that such interventions have long-term effects even when applied transiently in early adulthood, forming a “physiological memory.” Similar memory has been extensively documented in human epidemiology, where the health of older people is shaped by their earlier environmental exposures, such as diet composition. This Essay argues that the study of the biology of aging should encompass determinants of healthspan across the entire life course.
Source: Remembrance of things past: Towards a life-course biology of aging