Key Interventions in Longevity Medicine

Introduction to Longevity Interventions

The most effective interventions in longevity medicine include calorie restriction, exercise, mTOR inhibitors, and dietary modifications that reduce activation of nutrient-sensing pathways, directly targeting fundamental aging mechanisms and improving morbidity, mortality, and quality of life outcomes 1, 2

Calorie restriction is one of the most well-established longevity interventions, reducing frailty in naturally aging mice, genetically manipulated mice, and nonhuman primates 2
Protein restriction, particularly limiting specific amino acids like methionine, reduces mTOR activation and extends lifespan in rodent models 3
Intermittent fasting reduces frailty markers, though effects appear to be more pronounced in males than females 2
Ketogenic diets that mimic aspects of calorie restriction have shown modest effects on frailty indices in aging mice 2

mTOR inhibitors, such as rapamycin, extend healthspan and reduce frailty indices in multiple animal models, targeting a key nutrient-sensing pathway involved in aging 1, 2
Senolytics, drugs that target senescent cells, are emerging as promising interventions, with human clinical trials underway 4

Regular exercise, particularly aerobic exercise and high-intensity interval training, consistently reduces frailty in animal models 2
Voluntary wheel running improves physical performance and reverses frailty phenotypes in aging mice 2

Antioxidants like resveratrol reduce frailty in naturally aging mice 2
Alpha-ketoglutarate supplements attenuate frailty in aging mice, suggesting potential for repurposing as anti-aging interventions 2
Allicin, derived from garlic, inhibits inflammation and reduces frailty markers in aging mice 2

Drug treatment plus exercise regimens may better attenuate or even reverse frailty accumulation in aging than single interventions 2
De-prescribing unnecessary medications can be a viable strategy to combat frailty in older adults, as polypharmacy increases frailty scores in animal models 2

Frailty indices provide a translational measure of health in aging and can be used to monitor intervention effectiveness 1, 4
Biological age markers, such as DNA methylation clocks and telomere length, can help assess the impact of interventions on aging processes 5

Many longevity interventions show sex-specific effects, with some treatments being more effective in males than females or vice versa 2
Extrapolating from animal models to humans must be done cautiously, as humans have different lifespans and physiological responses 6
Combination of multiple interventions is likely necessary for meaningful impacts on human longevity, as addressing only one disease of aging would only add approximately 2.87 years to average lifespan 6
Timing of interventions is critical, with some showing greater benefits when started earlier in life while others can be effective even when initiated in later life 2