All About Serotonin

Serotonin does far more than regulate mood — 90% of it is made in your gut, not your brain. In this episode, Nurse Doza breaks down exactly what serotonin does, why so many people are unknowingly depleted, and how to naturally restore levels through gut health, B vitamins, sunlight, and targeted supplementation.

 

FEATURED PRODUCT

Bliss by MSW Nutrition

Serotonin production depends on methylation — and if your methylation pathways are sluggish, you can be doing everything right and still come up short. Bliss is a lemon-flavored sublingual powder featuring TMG (trimethylglycine), a powerful methyl donor that directly supports the methylation reactions your body needs to synthesize serotonin and dopamine. As discussed in this episode, the MTHFR gene, B vitamins, and SAMe are all essential cofactors in serotonin production — and Bliss is formulated to address exactly that gap. Just place it on your tongue and let it absorb in seconds. One serving a day is all it takes.

👉 Get Bliss here: https://mswnutrition.com/products/bliss

 

JOIN THE SCHOOL OF DOZA

If this episode opened your eyes to the gut-serotonin connection, imagine going even deeper. Inside the School of Doza, you'll find a full MTHFR course that explains exactly how your genetics affect your ability to produce serotonin, dopamine, and other neurotransmitters — and what you can do about it. Whether you're dealing with anxiety, mood swings, poor sleep, or brain fog, you're not alone in that journey. Our community is full of people working on the same root causes, and every Wednesday we host a live group consult (Ask Me Anything session) where you can bring your questions and get real answers — just like a private consultation, but with a room full of people who get it.

👉 Start your free trial: https://community.schoolofdoza.com/c/start-here

 

 

5 KEY TAKEAWAYS

• 90% of serotonin is made in your gut — not your brain. If your gut health is compromised, your serotonin production is compromised. Depression, anxiety, and mood disorders often have a digestive root cause that standard care rarely addresses.
• Gut dysbiosis — from antibiotics, processed foods, dairy, and poor diet — disrupts the bacterial enzymes and cofactors (like 5-HTP and TPH1) that your microbiome uses to synthesize serotonin. Healing the gut is foundational to healing the mood.
• Serotonin converts to melatonin at night. If you're low on serotonin, you're also likely low on melatonin — which explains why gut problems, depression, and insomnia so often travel together.
• B vitamins — especially B6 (P5P), B9 (methylfolate), and B12 — are essential cofactors for serotonin synthesis. MTHFR gene variants impair the methylation pathway that drives this process, making methylated B vitamins and methyl donors like SAMe critical for many people.
• Sunlight and exercise are among the most powerful natural serotonin activators. Combined with gut repair, B vitamin support, and targeted supplementation like Bliss, these lifestyle inputs can meaningfully shift your serotonin baseline without relying solely on medication.

 

TIMESTAMPS

00:00 – START – Welcome and episode overview

 

02:00 – Serotonin 101: what it is and why 90% is made in your gut

 

03:48 – School of Doza spotlight: the MTHFR course

 

06:46 – Serotonin and depression: what we've gotten wrong

 

09:08 – The gut microbiome: good bacteria, bad bacteria, and neurotransmitter production

 

11:31 – Antibiotics, 5-HTP, and how your gut makes serotonin

 

13:56 – Food, dairy, and diet choices that wreck your gut microbiome

 

16:23 – Why SSRIs alone aren't enough — and what to do instead

 

17:28 – Serotonin converts to melatonin: the gut-sleep connection

 

20:00 – The insomnia-depression-gut triangle

 

21:05 – B vitamins and methylation: essential cofactors for serotonin

 

23:18 – MTHFR, the liver, SAMe, and Bliss by MSW Nutrition

 

25:30 – The 5th factor: sunlight, exercise, and a full serotonin reset protocol

 

28:21 – Bliss — sublingual methylation support for serotonin and dopamine

 

RESOURCES

1. Serotonin Overview — Cleveland Clinic — Comprehensive guide to what serotonin is, what it does, and how it affects the body.

https://my.clevelandclinic.org/health/articles/22572-serotonin

 

1. Gut Microbiota and Serotonin Synthesis — ScienceDirect — Peer-reviewed research on how gut bacteria directly influence serotonin production, kynurenine pathways, bile acids, and vitamin cofactors.

https://www.sciencedirect.com/science/article/pii/S2950194626000142

 

1. Serotonin to Melatonin Conversion — PMC/NIH — Research on the biochemical pathway by which serotonin is converted