News
May 6, 2025

Can Your Gut Microbiome Influence Brain Health and Alzheimer’s Risk?

You’ve probably heard the phrase “gut feeling” — but did you know your gut may also influence how your brain functions?

Emerging research on the gut-brain axis suggests that the bacteria living in your digestive system — collectively known as the gut microbiome — may play a critical role in Alzheimer’s disease development and progression.

How Are the Gut and Brain Connected?

The gut and brain communicate through a complex network of nerves, hormones, and immune signals. This communication system, called the gut-brain axis, allows gut bacteria to influence:

  • Inflammation in the brain
  • Neurotransmitter production (like serotonin and dopamine)
  • The strength of the blood-brain barrier

When the microbiome is out of balance — a condition known as dysbiosis — it can trigger chronic inflammation, oxidative stress, and immune dysfunction, all of which are associated with Alzheimer’s pathology.

What Does the Research Say?

  • A 2019 study found that Alzheimer’s patients had a less diverse microbiome compared to healthy individuals.
  • Some gut bacteria can produce neurotoxins or promote amyloid plaque buildup.
  • Others may be protective, producing anti-inflammatory compounds or supporting nutrient absorption.

Though the science is still evolving, the data is compelling enough that researchers are exploring gut-targeted therapies to help slow or prevent dementia.

How to Support a Brain-Friendly Microbiome

You can positively influence your gut — and possibly your brain — through diet and lifestyle:

  • Eat more fiber-rich foods (like leafy greens, beans, and berries)
  • Incorporate fermented foods (yogurt, kefir, sauerkraut, kimchi)
  • Limit processed foods and excess sugar
  • Stay hydrated and reduce stress, both of which impact gut balance
  • Consider a high-quality probiotic supplement, if recommended by your doctor

Final Thoughts

Your gut may play a larger role in brain health than you ever imagined. Supporting your microbiome through smart dietary choices and stress management could be a powerful — and natural — way to reduce inflammation and lower Alzheimer’s risk.

The road to a healthy brain might just start in your stomach.