Effectiveness of multivitamin supplementation
Pro Research Analysisby 
Searched over 200M research papers
Multivitamin Supplementation and Health Outcomes
Multivitamin Supplementation for Chronic Disease and Mortality
Research shows that multivitamin supplementation can have positive effects on health outcomes in specific populations. In adults living with HIV, routine multivitamin supplementation was linked to reduced mortality, lower incidence of tuberculosis, and improved treatment outcomes, especially during the first year of antiretroviral therapy . In people with metabolic dysfunction-associated steatotic liver disease (MASLD), multivitamin use was associated with lower all-cause mortality, reduced risk of cardiovascular and chronic kidney disease, but did not significantly reduce liver-related mortality or cirrhosis . These findings suggest that multivitamins may offer protective effects in populations with chronic health conditions 110.
Multivitamin Supplementation in Healthy Individuals
For healthy adults, evidence is more limited but still points to some benefits. A pilot study found that multivitamin and multimineral supplementation led to reduced oxidative stress, improved energy metabolism, and better nutritional balance, as indicated by changes in blood markers such as lower homocysteine and increased vitamin B6 metabolites . Multivitamin use also improved the prevalence of nutrient adequacy, though it increased the risk of excessive intake for some nutrients, highlighting the importance of appropriate formulation and monitoring .
Cognitive and Psychological Benefits in Older Adults
Several studies have explored the impact of multivitamin supplementation on cognitive and psychological health in older adults. Daily multivitamin use improved memory performance, with effects equivalent to reversing about three years of age-related memory decline . Other research found that multivitamin supplementation reduced perceived stress, improved mood, increased feelings of friendliness, and reduced emotional loneliness, with some effects differing by sex 47. These results suggest that multivitamins may help maintain cognitive health and improve aspects of wellbeing in older adults 347.
Addressing Nutritional Gaps and General Health
Multivitamin and mineral supplements are commonly used to fill nutritional gaps, especially in populations where dietary intake may be insufficient. They can help prevent deficiencies that lead to conditions like anemia, osteoporosis, and neural tube defects. Some evidence also supports benefits for cancer prevention (especially in men), cataract prevention, and aspects of cognitive performance. Multivitamin supplements are generally well tolerated and do not appear to increase the risk of mortality or major cardiovascular events in the general population 58.
Metabolic Health and Obesity
Animal studies suggest that multivitamin supplementation may improve metabolic health by reducing weight gain, improving blood glucose and insulin resistance, increasing energy expenditure, and promoting beneficial changes in the gut microbiome. These effects could be relevant for strategies to combat obesity and related metabolic disorders .
Conclusion
Multivitamin supplementation appears to offer several health benefits, particularly for individuals with chronic health conditions and older adults. Benefits include reduced mortality in specific populations, improved cognitive and psychological wellbeing, better nutritional status, and potential metabolic advantages. However, the effects in healthy adults are generally modest, and the risk of excessive intake for some nutrients should be considered. More research is needed to clarify the long-term impact of multivitamin use on chronic disease prevention and overall health in the general population.
Sources and full results
Most relevant research papers on this topic