Better Diet Linked to Slower Epigenetic Aging, But Exercise Steals the Show

Based on: Healthy Eating Index, Epigenetic Age Acceleration and Mortality Risk in US Adults.

Moderate Evidence·Journal Article·Aging cell·May 2026

In two large U.S. studies of older adults, eating a higher-quality diet was tied to slower epigenetic aging and lower death risk. About 44% of the diet-mortality link was explained by GrimAge, a biological aging clock. But when researchers accounted for physical activity, the diet effect mostly disappeared. Movement may matter as much as the menu.

Key Insight

This study suggests pairing a healthy diet with regular physical activity may matter more than diet alone.

Original Paper

Beydoun MA, Fanelli Kuczmarski MT, Noren Hooten N, Beydoun HA, Tsai J, Maldonado AI, Hossain S, Nieva A, Evans MK, Zonderman AB

Aging cell··3,910 U.S. adults from NHANES and HRS cohorts

Related Studies

Exercise May Ease Anxiety, Especially Mind-Body and Aerobic Workouts

Looking at 10 studies of about 2,400 adults with generalized anxiety, researchers found exercise was linked to lower anxiety symptoms. Mind-body workouts like yoga and aerobic exercise showed the biggest effects, while resistance training results were unclear. Programs lasting 8 weeks or more with sessions of 21 to 40 minutes seemed most helpful. However, the studies varied widely, so the authors caution this is suggestive, not definitive.

BMC sports science, medicine & rehabilitation·Moderate·May 13, 2026

Just 5,700 Daily Steps Cut Death Risk By 13% In Older Adults

Looking at dozens of studies with over 367,000 older adults, regular walking was tied to lower risk of death, disease, and cognitive decline. Each extra 1,000 daily steps was linked to a 13% drop in death from any cause. Walking pace did not change the benefit, so slow walks counted too.

American journal of health promotion : AJHP·Strong·May 12, 2026

Exercise Linked to Younger Biological Age, But Effect Is Modest

Pulling together 44 studies on nearly 145,000 people, researchers found that more physical activity is tied to a younger biological age, but only on certain epigenetic clocks. The effect showed up clearly on GrimAge and Horvath clocks, but not on Hannum or PhenoAge. The size of the benefit was small, and most data came from snapshot studies, so we can't say exercise actually causes the slowdown yet.

The lancet. Healthy longevity·Moderate·May 4, 2026

Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.