
Gut Makes 95% of Serotonin: Why It Matters for Your Brain
The gut-brain serotonin pathway is the mechanism behind mood swings, anxiety, and brain fog that start in your digestive system.

The gut-brain serotonin pathway is the mechanism behind mood swings, anxiety, and brain fog that start in your digestive system.

The tryptophan-serotonin pathway your gut bacteria run — and what happens when it stops working.

Your body needs tryptophan to make serotonin. But when your gut is inflamed, that tryptophan gets stolen — and the byproducts are worse than low mood.

Your gut bacteria manufacture most of your body’s serotonin. Here’s how that connection works and what you can do about it.

Your gut bacteria are quietly running your mood. Here’s the science behind the gut-brain connection and what you can do about it.

The trillions of bacteria in your gut are quietly running your sleep-wake cycle through serotonin, melatonin, and the vagus nerve — and most women over 35 have no idea.
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