Gut Health and Aging – How the Microbiome Affects Balance and Immunity

 

How gut diversity changes as we age and why fermented foods, probiotics, and fiber support immune function and the gut-brain axis.

Your gut microbiome regulates roughly 70% of your immune system and communicates directly with your brain via the vagus nerve.

Microflora Changes Over Time

As gastric acid production decreases with age, beneficial gut bacteria numbers drop. Rebuilding microbiome diversity requires:

• Probiotic Foods: Kefir, yogurt, sauerkraut, and kimchi.

• Prebiotic Soluble Fiber: Onions, garlic, oats, and bananas that feed healthy microbes.