Dr. Brennan Spiegel
speaker
615 appearances
1 recordings
1 series
first heard Jun 2026
last heard 8 Jun
Dr. Brennan Spiegel’s voice in public audio — every appearance, attributed to the second.
Trend
recordings per month · last 12 monthsRecordings per month over the last 12 months — 1 in all, peaking in Jun 2026 with 1.
Appearances
The Mel Robbins Podcast · The Hidden Reason You Feel Exhausted & How to Feel Better Now · 8 Jun 2026
podcast
in terms of changing the microbiome, those trillions of organisms that get backed up.
If your stomach's almost like a garden hose, if it gets kinked, the water backs up.
Most people think of serotonin as a happy chemical.
You know, it's like the anti-depression chemical.
And it is that.
But you might be surprised that about 95% of your body's serotonin comes from your gut.
Not your brain, it comes from the gut.
And in fact, it depends upon the microbiome, which is all those organisms.
So what happens is when you eat certain foods, particularly foods with tryptophan, so tryptophan turns into serotonin in your gut, and then serotonin circulates all throughout your body
Without it, you and I would be collapsed on the ground right now like a little baby.
A baby has very little serotonin in its body because it hasn't yet colonized its gut.
To be able to create enough serotonin to prime your muscles, to help those pumps and tubes contract, it requires serotonin.
The lymphatic system that's bringing all the waste back up from your ankles requires serotonin.
If we look at what serotonin does, it literally elevates you, mind and body.
Wow.
And it looks like the gut, in part, evolved with the microbiome to allow us to get out of the ocean.
We brought our own hydrothermal vent with us to allow all those critters to come with us.
And they gave us serotonin, which gave us gravity management abilities.
That means a few things.
That means your muscles and bones are strong so that you can stand up.
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