New research quantifies the dramatic decline in gut microbiome diversity across the human lifespan, with measurements revealing a collapse from 85 percent diversity in young adults to just 45 percent in older populations. This 47-point decline correlates directly with weakened immune surveillance and control mechanisms that normally maintain beneficial microbial communities.
The loss of microbial diversity disrupts essential metabolic functions, particularly the production of short-chain fatty acids that regulate inflammatory responses throughout the body. Without adequate microbial diversity, chronic low-grade inflammation develops and perpetuates age-related diseases ranging from cardiovascular conditions to neurocognitive decline.
Centers for Disease Control and Prevention research confirms that this ‘inflammaging’ process represents a central mechanism in aging pathology. Understanding the quantitative relationship between microbiome changes and immune function decline provides a measurable foundation for developing preventive interventions.
Read the full article on GMJ Newsroom.
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