03/06/2026
Your gut bacteria literally make your mood chemicals.
I know that sounds dramatic. It isn't. It's one of the most well-established findings in modern science, and it changes the way we should be thinking about anxiety, depression, and mood regulation entirely.
What's actually happening . . .
Around 90% of your serotonin (your "feel good" neurotransmitter) is made in your gut, not your brain. Your gut bacteria also produce GABA (your calming neurotransmetter), dopamine precursors, and a range of compounds that talk directly to your nervous system via the vagus nerve.
In other words, your gut and your brain are in constant, two-way conversation. And the makeup of your gut bacteria has an enormous influence on what that conversation sounds like.
This is why:
▸ Anxiety often improves dramatically when we heal the gut
▸ "Brain fog" is rarely just a brain issue
▸ Antibiotics can cause mood changes that last months
▸ Stress damages the gut, and a damaged gut amplifies stress (the loop)
▸ Diets high in ultra-processed food are linked to higher rates of depression
▸ Some of the most powerful "mental health" interventions are actually digestive.
When I work with mood, anxiety, or low energy, the gut is almost always one of the first places we look. Not because supplements are going to replace therapy or psychiatric care where it's needed. But because you cannot have a calm mind in an inflamed gut. The biology won't let you.
If you've been treating your mood as a purely mental issue and it's not shifting, you may be having the conversation in the wrong place.
The answer might be lower down than you think.
If your mood, gut, or energy aren't where you want them, let's look at the whole picture. Bookings open, link in bio.