Bioactive compounds, either produced endogenously by the host or generated by the gut microbiota, that possess the chemical properties to safeguard neurons against damage, oxidative stress, and neuroinflammation. These metabolites are essential for maintaining the structural integrity and functional longevity of the central and peripheral nervous systems. They play a crucial role in preventing age-related cognitive decline and supporting brain health.
Origin
The concept stems from nutritional neuroscience and the growing understanding of the molecular basis of neurodegenerative diseases and aging. The focus shifted from treating damage to proactively preventing it, leading to the identification of these protective molecules. In the context of hormonal health, the origin is linked to the discovery that optimal endocrine signaling enhances the production or utilization of these protective substrates.
Mechanism
These metabolites function by multiple pathways, including acting as potent antioxidants to neutralize reactive oxygen species that damage neuronal membranes and DNA. Many also modulate inflammatory signaling cascades within the brain, reducing the activation of microglia and astrocytes. Furthermore, certain gut-derived short-chain fatty acids, a class of metabolites, can promote the expression of neurotrophic factors and support blood-brain barrier integrity.
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