Many scientists are looking to halt age-related cognitive decline. The COSMOS study looked at the impact of multivitamin and mineral supplementation on cognition. Find out more about the results of this large-scale study.
The COSMOS (COcoa Supplement and Multivitamin Outcomes Study) is a randomised, double-blind, placebo-controlled clinical trial involving 21,442 adults, published in March 2024 in The American Journal of Clinical Nutrition.
This large-scale study examines the effect of cocoa flavanol supplements and multivitamin supplements on several aspects of the health of older adults, including cardiovascular disease, cancer and cognitive function (1).
Within this vast COSMOS study, a meta-analysis combined the results of three sub-studies called COSMOS-Clinic, COSMOS-Mind and COSMOS-Web, which evaluated the effects of multivitamins on cognition.
The COSMOS-Clinic sub-study was conducted on 573 people aged over 60.
It observed certain benefits in people taking a multivitamin supplement compared with those taking a placebo, in terms of overall cognition.
According to this sub-study, the difference proved to be particularly significant in terms of episodic memory, which refers to the ability to remember past events by linking them to their context.
The meta-analysis of the various sub-studies also showed clear evidence of these same benefits in the context of daily multivitamin and mineral supplementation over 2 years.
The tests carried out determined that the difference observed in overall cognition would be equivalent to a reduction in cognitive aging of around 2 years.
The results of the COSMOS study therefore confirm the benefits of this type of supplementation in preventing cognitive decline in the elderly.
Vitamins and minerals are known to play an essential role in maintaining numerous physiological functions, including cognitive health (2).
More specifically, the nutrients that play a decisive role in cognitive function are:
Age-related cognitive decline is the result of a number of factors, including oxidative stress, inflammation, reduced neurotransmitters, reduced cerebral blood flow, loss of synaptic plasticity, accumulation of toxic proteins, and so on.
Vitamins and minerals in the diet help to combat this phenomenon.
However, aging is generally accompanied by a reduction in the intestinal absorption of nutrients, or even less effective cellular utilisation, which may require higher intakes of vitamins and minerals, particularly through supplementation.
The high vitamin and mineral intake provided by a quality food supplement (such as Daily 3®) helps to compensate for the deficiencies caused by aging.
This helps to reduce oxidative stress, modulate inflammation, support cellular energy and protect neurons, thereby helping to preserve cognitive functions such as memory.
Some multivitamins may contain other nutrients of interest for brain health, in particular antioxidant compounds - in addition to vitamin B2, vitamin C, zinc and selenium, which are themselves antioxidants.
Examples of antioxidants include anthocyanidins in bilberry extract, proanthocyanidins in pine bark extract, polyphenols in green tea or grape seed extracts, oleuropein in olive extract, etc. (all these phytonutrients are found in Daily 3® multivitamin, in addition to the vitamins and minerals mentioned above) (3).
Some multivitamins even supplement this arsenal with valuable compounds such as:
So, for more complete coverage of your needs, you should ideally turn to multivitamin formulas that include not only the targeted vitamins and minerals, but also antioxidant compounds and/or compounds of interest for cognition and general health (this is true of our flagship multivitamin Daily 3®, the most complete and highest dose on the market).
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