Healthy Aging Lifestyle

Research summary

• A widely cited BMJ cohort study following US health professionals over decades found that people who maintained five low-risk lifestyle factors (never smoking, healthy weight, regular physical activity, moderate alcohol intake, and a quality diet) lived on average many years longer free of cancer, cardiovascular disease and type 2 diabetes than those who maintained none.
• This has been replicated in different contexts: a UK Biobank study found healthy lifestyle was associated with longer life expectancy even in people who already had multiple chronic conditions, a nationwide cohort study linked combined healthy lifestyle factors to both longer life expectancy and lower lifetime healthcare costs, and a systematic review and meta-analysis of the American Heart Association's "Life's Essential 8" composite score found it strongly predicts lower cardiovascular disease risk.
• A meta-analysis of lifestyle-intervention trials found that more intensive, longer interventions produced greater long-term mortality benefit than brief ones.
• The consistency of this combined-lifestyle-factor finding, replicated across multiple independent large cohorts and different scoring systems, makes it one of the more robust conclusions in the entire lifestyle literature — though of course it aggregates several individually-studied factors rather than being a single isolated exposure.