How Diet, Fitness, and Multivitamins Slow Biological Aging: 3 Key Studies

New research indicates that daily multivitamin use, consistent aerobic exercise, and plant-forward dietary shifts can measurably slow biological aging. According to a 2026 study of 958 adults, those taking daily multivitamins for two years showed slower cellular-level aging via epigenetic clocks compared to placebo groups. Separate findings suggest that midlife cardiorespiratory fitness correlates with a longer health span, while short-term dietary changes can reduce the gap between biological and chronological age in just four weeks.

Can Daily Multivitamins Actually Slow Aging?

Daily multivitamin use may influence biological aging by affecting chemical changes in DNA, according to a 2026 study published in Aging Cell. Researchers tracked 958 older adults who took Centrum Silver multivitamins alongside 500 milligrams of cocoa flavanols daily for 24 months. By using “epigenetic clocks”—tools designed to measure cellular deterioration—the study found participants experienced slower biological aging than those in a control group.

However, experts urge caution regarding these results. Michelle Routhenstein, a preventive cardiology dietitian at Entirely Nourished, noted that while the findings are encouraging, they reflect changes in biomarkers rather than direct evidence of increased life span or reduced disease incidence. She categorized the data as preliminary.

How Does Midlife Fitness Impact Long-Term Health?

Higher cardiorespiratory fitness during midlife is linked to a longer, healthier life, according to a 2026 study of 24,576 adults aged 65 and younger. The research, which utilized treadmill testing to measure how efficiently the heart and lungs deliver oxygen to muscles, found that men with higher fitness levels enjoyed a 2% longer health span and 9% fewer disease diagnoses. Women in the study showed similar health outcomes.

Dr. Cheng-Han Chen, an interventional cardiologist and medical director of the Structural Heart Program at MemorialCare Saddleback Medical Center, stated that these results reinforce cardiorespiratory fitness as a primary marker for future health. He emphasized that physical activity should be a standard component of daily routines to mitigate the onset of heart disease and diabetes.

Can Short-Term Dietary Changes Reverse Biological Age?

Adopting a plant-forward diet may reduce the gap between biological and chronological age in as little as four weeks. A study published in April 2026 evaluated participants using the Klemera-Doubal Method (KDM), an algorithm for calculating biological age. Those who shifted toward high-carbohydrate or high-fat semi-vegetarian diets saw a significant reduction in their biological age compared to those following an omnivorous, high-fat diet.

Routhenstein explained that these improvements likely stem from better insulin sensitivity, cholesterol levels, and blood pressure. While she cautioned against using the term “true age reversal”—as long-term sustainability remains unproven—she noted that the rapid response in older adults suggests it is never too late to adopt healthier eating patterns.

Comparison of Research Findings

Frequently Asked Questions

• What is the difference between biological and chronological age?
  Chronological age is the time passed since birth, while biological age measures the physical state and deterioration of your cells.
• Can exercise prevent chronic disease?
  Yes, according to Dr. Cheng-Han Chen, regular aerobic activity can delay the onset of conditions like heart disease, diabetes, and stroke.
• How quickly can diet affect biological age markers?
  Recent research indicates that meaningful shifts in cardiometabolic biomarkers can occur in as little as four weeks through plant-forward dietary changes.