How Does Gut Health Influence Your Brain and Fear Response?
You are what you absorb, not just what you eat.
In other words, however well you eat, if your gut isn’t functioning well your brain and body won’t get the nutrients they need.
This reframe of an old saying is a key insight from my conversation with this week’s Fearless Forward podcast guest, nutritional therapist Sarah Bayliss.
Sarah’s expertise is rooted in personal experience. After years in a high-stress marketing job, she suffered from sleep issues, hormonal imbalances, and gut problems that eventually led her to burnout. Her recovery began with small, consistent changes that led to a profound personal transformation.
In this information-rich conversation, we hear that the gut-brain axis - formed of the vagus nerve, the gut microbiome, and the immune and hormonal pathways - is the bidirectional communication network linking our digestive system and our brain. The gut-brain axis supports brain function, mood, and stress management.
Sarah also explains how our gut health, nutrition, circadian rhythms, blood sugar stability, and recovery, have a powerful impact on our mental resilience. For example, when we eat foods that cause a blood sugar spike and subsequent crash, our body seeks rebalance by activating the stress response. In a state of physiological stress, the brain function shifts away from the pre-frontal cortex (our thinking brain) and into survival mode - which inhibits our capacity to face our fears clearly and calmly.
If you’ve ever felt “off” and couldn’t put your finger on why, or if you’re looking for practical ways to feel more grounded and less reactive, this episode gives you some powerful answers.
Here are my top five takeaways:
The gut has a protective role. A compromised gut lining (leaky gut) not only causes inflammation in the body, it also impacts brain health (leaky brain).
A key to good health is gut bacteria diversity, which produces metabolites that modulate immune, hormone, and brain health via the vagus nerve.
Light, sleep, movement, and stress management are as important as nutrition.
Blood sugar swings are a fear amplifier.
A holistic assessment of daily rhythms, diet, stress, and sleep is the first step to restoring energy and vitality.
With love from the mountain,
Sally-Anne