Nutrition and ageing: knowledge, gaps and research priorities

Area of Science:

• Gerontology and Nutritional Science
• Investigating the biological basis of aging and the role of dietary interventions.

Background:

• Human life expectancy has risen by 50 years in two centuries, with genetics accounting for one-third of variation.
• Most lifespan variation is due to stochastic and environmental factors, including diet.
• Dietary restriction extends lifespan in model organisms, but human efficacy is unknown.

Purpose of the Study:

• To explore the plasticity of the aging process and the impact of diet on healthspan.
• To identify effective dietary interventions for promoting healthy aging and preventing age-related diseases.

Main Methods:

• Review of observational data linking dietary patterns (e.g., Mediterranean diet) with aging.
• Analysis of existing research on molecular damage accumulation as a driver of aging.
• Assessment of the limited empirical evidence for dietary changes prolonging healthy lifespan.

Main Results:

• Aging is driven by accumulated molecular damage, leading to cellular and tissue dysfunction.
• Observational studies suggest links between eating patterns and aging, but empirical evidence is scarce.
• Little is known about sustainable dietary behavior change interventions for healthy aging.

Conclusions:

• Further research is needed to understand the biological pathways connecting diet and aging.
• Development of effective lifestyle interventions, including dietary changes, is crucial for preventing age-related disease.
• Robust markers for healthy aging are required to test dietary interventions.