Probiotics for an Aging Brain: Do Healthy Bacteria Boost Cognition?




Probiotics for an Aging Brain: Do Healthy Bacteria Boost Cognition?


As we grow older, changes in the gut microbiome and decreased cognitive skills often occur in tandem. This has led scientists to hypothesize that maintaining a healthy community of gut bacteria may help preserve cognitive abilities into old age. Emerging research on probiotics suggests these beneficial microorganisms could be a key piece of the puzzle.


The gut microbiome refers to the vast population of bacteria and other microbes that live in the intestines. This complex internal ecosystem plays important roles in nutrient absorption, digestion, metabolism, and immunity. Intriguingly, the gut microbiome also communicates with the brain via the gut-brain axis. 


Studies indicate that unhealthy changes in the gut microbiome are linked to inflammation, diminished brain function, and conditions like Alzheimer’s disease. Supplementing with probiotics may help counteract these detrimental shifts. 


Probiotics are live microorganisms that provide health benefits when consumed. Common probiotic strains are types of bacteria that normally inhabit the human gut. Probiotic foods and supplements replenish healthy gut bacteria to optimize the microbiome. 


Research demonstrates that probiotic supplementation can improve markers of cognitive function including memory, learning, and reaction time. For example, a placebo-controlled trial published in Frontiers in Aging Neuroscience found that consuming a multi-strain probiotic for 12 weeks significantly improved cognitive performance in adults over 60 years old. 


Experts propose that enhancing the gut microbiome with probiotics may benefit cognition through several pathways. These include reduced inflammation, optimized brain cell signalling, increased production of mood-regulating neurotransmitters, and improved insulin sensitivity.


As life expectancies lengthen, supporting brain health into old age is a major public health goal. Modulating the gut microbiome through probiotic intake represents a promising supplemental approach to maintaining cognitive abilities as we age. Consuming probiotic-rich foods like yogurt, kefir, and fermented vegetables may lend your brainpower a helping hand.



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