Multivitamins Under the Microscope: What Does the Study Really Say?

07.04.2026 Redaktion

Can Multivitamins Affect Biological Age?

Multivitamin and mineral supplements are among the most commonly used dietary supplements. But what does the science say?

A recent study published in the journal *Nature Medicine* investigated whether taking multivitamins daily can influence so-called markers of biological aging.

What did the study examine?

The large-scale COSMOS study analyzed over several years how daily supplementation with a multivitamin-mineral supplement—sometimes combined with cocoa extract—affects certain biological processes.

The focus was on so-called epigenetic markers, which are used in research to investigate age-related changes at the molecular level.

Study Results – A Factual Overview

The results show that taking a multivitamin supplement may be associated with changes in certain biomarkers.

Important considerations:

These are scientific observations, not evidence of a slowing of the aging process
The markers examined are complex laboratory parameters, not directly perceptible effects
The practical relevance for everyday life is currently still limited

The study thus provides interesting insights but does not replace established recommendations on diet and lifestyle.

What role do vitamins and minerals play?

Regardless of individual studies, it is well established that vitamins and minerals perform important functions in the body.

The following claims are permitted under the EU Health Claims Regulation:

Vitamin C, vitamin D, zinc, and selenium contribute to the normal function of the immune system
Vitamin B6, vitamin B12, and folic acid contribute to normal energy metabolism
Vitamin E helps protect cells from oxidative stress
Zinc contributes to the maintenance of normal skin, hair, and nails

These functions underscore the importance of an adequate supply of micronutrients.

Who might benefit from multivitamins?

Ideally, an adequate supply of micronutrients is ensured through diet. However, in certain situations, supplementation may be beneficial, for example:

in cases of an unbalanced diet
during periods of increased stress
when there is an increased need in certain life situations

Important: Dietary supplements are not a substitute for a varied and balanced diet and a healthy lifestyle.

Conclusion: What does the study mean for you?

Current research shows that multivitamins are the subject of intensive scientific investigation and may potentially influence certain biological processes.

At the same time:

The results do not yet provide evidence of specific health effects in everyday life
A balanced diet remains the foundation
Dietary supplements can serve as a targeted addition

Multivitamins Under the Microscope: What Does the Study Really Say?