Randomized trial shows daily multivitamin use linked to slower biological aging in older adults — Evidence Review
Published in Nature Medicine, by researchers from Mass General Brigham, Medical College of Georgia at Augusta University
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Table of Contents
A large randomized trial suggests that daily multivitamin use may slow biological aging in older adults, as measured by DNA-based epigenetic clocks; most related studies find that multivitamins are generally safe but show mixed or limited evidence for long-term mortality benefits. Several reviews and meta-analyses support potential roles for nutrition in healthy aging and cognitive preservation, but broader effects on lifespan and disease prevention remain under debate (1, 2 4 5 6 7).
- The new study's finding that multivitamin use is linked to slower biological aging aligns with previous research indicating associations between multivitamin use and longer telomere length, a marker of cellular aging (1).
- However, large meta-analyses and cohort studies generally report no significant impact of multivitamin supplementation on all-cause mortality in adults, suggesting benefits may be limited to specific health domains or subpopulations (2 4).
- Recent evidence indicates potential cognitive benefits of multivitamin supplementation in older adults, supporting the idea that nutritional strategies may help maintain aspects of healthy aging even if effects on lifespan are minimal (5 6 7).
Study Overview and Key Findings
Interest in strategies for promoting healthy, high-quality aging is growing as global populations age. While previous research has focused on preventing age-related diseases, relatively few large-scale randomized trials have investigated whether accessible interventions like multivitamin use can influence biological measures of aging. The study highlighted here, conducted by researchers at Mass General Brigham and collaborators, addresses this gap by examining the impact of daily multivitamin supplementation on DNA methylation-based markers of biological aging in older adults over a two-year period. This approach offers insight into aging at the molecular level, rather than relying solely on clinical outcomes or self-reported health.
| Property | Value |
|---|---|
| Organization | Mass General Brigham, Medical College of Georgia at Augusta University |
| Journal Name | Nature Medicine |
| Authors | Howard Sesso, Sidong Li, Rikuta Hamaya, Alexandre C. Pereira, Kerry L. Ivey, Pamela M. Rist, JoAnn E. Manson, Haidong Zhu, Brian H. Chen, Yanbin Dong |
| Population | Older adults |
| Sample Size | n=958 |
| Methods | Randomized Controlled Trial (RCT) |
| Outcome | Biological aging measured by epigenetic clocks |
| Results | Multivitamin use linked to four months slower biological aging |
Literature Review: Related Studies
To place these findings in context, we searched the Consensus database, which includes over 200 million research papers. The following queries were used to identify relevant literature:
- multivitamin aging biological markers
- daily multivitamin effects on longevity
- nutritional supplements aging process research
Below, we group insights from the literature into key research topics.
| Topic | Key Findings |
|---|---|
| Do multivitamins influence biological aging and cellular markers? | - Multivitamin use is associated with longer telomere length in women, suggesting a potential link to slower cellular aging (1). - Diets high in nutrients and antioxidants may reduce risk of telomere shortening and promote healthy aging (6 8). |
| What is the impact of multivitamins on mortality and disease prevention? | - Meta-analyses and large cohort studies consistently find no significant reduction in all-cause mortality risk from multivitamin use in adults (2 4). - Some interventions, such as vitamin D, may reduce specific risks like falls and fractures (9). |
| Can multivitamin supplementation affect cognitive function and brain health in aging? | - Daily multivitamin-mineral supplementation has been shown to modestly benefit global cognition and episodic memory, potentially slowing cognitive aging (5 7). - Nutritional supplements may improve cognitive health, but effects vary by individual and supplement type (7). |
| How do specific nutrients and broader nutritional patterns relate to aging and longevity? | - Diets rich in vegetables, fruits, fish, and healthy fats are associated with reduced cardiovascular and obesity risk, and may support healthy aging (6 8). - Supplementation targeting oxidative stress and mitochondrial function (e.g., GlyNAC) may increase lifespan in animal models (3 10). |
Do multivitamins influence biological aging and cellular markers?
The current study's focus on DNA methylation-based epigenetic clocks as markers of biological aging is supported by earlier research linking multivitamin use to longer telomeres, another cellular marker of aging (1). Dietary patterns rich in micronutrients and antioxidants have also been associated with healthier biological aging and reduced risk of telomere shortening (6 8).
- Multivitamin use was linked to longer telomere length in women, suggesting a possible slowing of cellular aging (1).
- Diets that provide antioxidants and essential nutrients may protect against age-related DNA damage and telomere attrition (6 8).
- The new study extends this evidence by using epigenetic clocks, a more recent and comprehensive marker of biological aging.
- While suggestive, these biomarker studies do not directly demonstrate effects on long-term health outcomes or longevity (1 6 8).
What is the impact of multivitamins on mortality and disease prevention?
Despite interest in multivitamins as preventive interventions, large meta-analyses and cohort studies have found no significant association between multivitamin use and reduced all-cause mortality in independently living adults (2 4). Targeted interventions, such as vitamin D supplementation, may lower specific risks like fractures and falls in the elderly, but general multivitamin use has not been shown to extend lifespan (9).
- Meta-analyses report no effect of multivitamin-multimineral supplementation on mortality from any cause, cancer, or vascular disease (2 4).
- Many adults use multivitamins for perceived health benefits, but the evidence for disease prevention is limited (4).
- Some specific supplements (e.g., vitamin D) can reduce risk of falls and fractures in older adults (9).
- The new study's finding of slower biological aging has not yet been linked to reductions in clinical endpoints like mortality (2 4 9).
Can multivitamin supplementation affect cognitive function and brain health in aging?
Recent trials and meta-analyses indicate that daily multivitamin-mineral supplementation can modestly benefit cognitive function and episodic memory, potentially slowing cognitive aging in older adults (5 7). However, the magnitude of these effects is small, and individual response varies depending on factors like baseline nutritional status and supplement composition (7).
- Multivitamin supplementation was associated with better global cognition and episodic memory in older adults over two years (5).
- Meta-analyses within the COSMOS trial found a modest reduction in cognitive aging equivalent to about two years (5).
- Broader reviews suggest that nutritional supplements have variable effects on cognition, with some promising findings and other null results (7).
- The new study's focus on biological aging may help explain observed cognitive benefits from multivitamin use (5 7).
How do specific nutrients and broader nutritional patterns relate to aging and longevity?
Beyond multivitamin use, dietary patterns rich in vegetables, fruits, nuts, fish, and unsaturated fats are consistently associated with better cardiovascular and metabolic health, and may promote healthy aging by reducing oxidative stress and inflammation (6 8). Experimental evidence in animals suggests that specific supplements (e.g., GlyNAC, NAD+ precursors) may extend lifespan and ameliorate age-related cellular dysfunction (3 10).
- Diets high in plant foods, healthy fats, and antioxidants support healthy aging and may help prevent age-related diseases (6 8).
- Antioxidant supplementation can reduce cellular oxidative stress, a major driver of aging-related damage (8).
- Animal studies using targeted supplements like GlyNAC have shown increased lifespan and improved markers of cellular health, but human evidence is still limited (3 10).
- The new study adds to understanding of how broad-spectrum supplementation (multivitamins) may influence aging pathways in humans (3 6 8 10).
Future Research Questions
While this study provides new evidence linking daily multivitamin use to slower biological aging, further research is needed to determine the clinical significance of these changes, understand underlying mechanisms, and identify which populations may benefit most. Gaps remain regarding long-term outcomes, the persistence of benefits after supplementation, and the interplay with broader dietary and lifestyle factors.
| Research Question | Relevance |
|---|---|
| Does slowing biological aging via multivitamin use lead to improved clinical outcomes? | Understanding whether reductions in biological aging markers translate into tangible health benefits, such as reduced disease incidence or improved quality of life, is crucial for clinical recommendations (2 4 5). |
| Are the effects of multivitamin supplementation on biological aging sustained after cessation of use? | The duration and persistence of any anti-aging effects from supplementation remain unclear, with implications for dosing regimens and long-term use (5 6). |
| Which subpopulations of older adults benefit most from multivitamin supplementation? | Identifying characteristics (e.g., baseline nutritional status, rate of biological aging) that predict benefit could help personalize interventions and maximize effectiveness (1 5 7). |
| How do multivitamin effects on biological aging compare with those of other nutritional or lifestyle interventions? | Comparing multivitamin use to dietary changes, single-nutrient supplements, or exercise may clarify the most effective strategies for promoting healthy aging (6 8 9). |
| What are the mechanisms by which multivitamins may influence epigenetic clocks and other aging biomarkers? | Elucidating how micronutrients affect DNA methylation and other biological processes could inform targeted interventions and the development of new biomarkers of aging (1 3 8 10). |