There's something most people have never thought to check.
Not their vitamin D. Not their blood sugar. Not their cholesterol.
It's the label on the back of their B vitamin.
"Go look at your multivitamin right now. If it says folic acid — your body might not be using any of it."
That's how Nurse Doza opened this week's MTHFR class. Then he spent the next hour explaining why — and what it means for everything from depression and dementia to fatty liver and long-term cancer risk. The kind of explanation that should be happening in every doctor's office. The kind that somehow still isn't.
I want to share three questions that came up from members during class — because the answers change the way you read a supplement label for the rest of your life.
Here's what we're covering today — click to jump to your section:
Q: I take a B vitamin every day. My doctor says my levels look fine. How do I actually know if my body is converting it?
A: This is the question Nurse Doza says comes up constantly — and the answer starts with what your doctor probably isn't testing.
Most standard panels check B12. They don't check B9. And they rarely check whether the conversion from folic acid to usable folate is actually working. The lab marker that tells you that is called homocysteine, and it typically only gets ordered when a doctor suspects heart disease or a stroke risk.
Here's the mechanism. Folic acid — the synthetic form of B9 found in most multivitamins, prenatals, fortified cereals, and grocery store supplements — is not the form your body actually uses. It's supposed to be converted into the active form, called folate or 5-MTHF, through a gene called MTHFR. The problem: roughly 60 to 70 percent of the population carries a mutation in that gene that slows or blocks that conversion. For some people, it's minor. For people with the more severe double-TT variant, folic acid can accumulate in the bloodstream and make things worse, not better.
Nurse Doza pulled up his own labs in class. He carries the double-TT MTHFR variant — one of the worst. His homocysteine is currently 6.07, well within the optimal range. Not because of good genetics. Because he's been taking the right form of B9 — methylfolate, not folic acid — along with the cofactors that support the rest of the methylation cycle.
If your doctor has never mentioned homocysteine, that's not a gap in your health. That's a gap in what mainstream medicine is looking at.
We're three classes into this MTHFR series with three more left this month — covering epigenetics, neurotransmitters, and how to build your personal methylation protocol. Each class builds directly on this one.
Q: You mentioned that low B9 is connected to depression. I've been on antidepressants for years, and they've slowly stopped working as well. Is there actually a connection here?
A: Nurse Doza answered this one carefully — and personally.
The mechanism first. Drugs like Prozac, Zoloft, and Wellbutrin work by slowing the reabsorption of serotonin, so whatever your body is producing stays active a little longer. What they don't do is increase serotonin production. If your methylation cycle is broken and your B9 isn't converting, your body isn't manufacturing much serotonin to begin with. The medication is holding on to less and less over time.
What actually creates more serotonin? Two compounds: SAMe and trimethylglycine (TMG). These are the two ingredients in MSW Nutrition's Bliss supplement — and SAMe is used as a prescription antidepressant in the United Kingdom. That's not alternative medicine. The research is there. It's just not the conversation pharmaceutical reps are walking into clinics to have.
Nurse Doza shared his own story in class. He's a recovering alcoholic. His dopamine and serotonin production was compromised for most of his life — not as a character flaw, but because of his MTHFR genetics. His body couldn't convert folic acid. It couldn't complete the methylation cycle. It couldn't make the neurotransmitters it needed. When he finally understood the mechanism and gave his body what it was missing, everything changed. That's what eventually led to MSW Nutrition and to building The School.
He's not anti-medication. He's pro-understanding-the-mechanism — and pro-giving your body the raw materials it needs to actually do its job.
Every completed course in The School library is available for $10 — all the recorded classes in the full series, prerecorded from live sessions.
No Grains No Sugar, the Sleep series, the Gallbladder course, and more.
Q: I hear you. But I don't want to learn biochemistry. I just want to know what to actually take.
A: Nurse Doza hears this constantly — and he's always direct about it: fair enough.
Here's the protocol he uses personally and recommends for anyone with MTHFR issues or suspected methylation problems:
Liver Boost is where he starts. It contains 16 ingredients that support Phase 1 and Phase 2 liver detoxification — and the MTHFR gene operates inside Phase 2. The very first ingredient on the label is 5-MTHF — active methylated folate, not folic acid. The rest of the formula is built around glutathione production: NAC, turmeric, alpha lipoic acid, green tea, milk thistle. Each has clinical research showing it increases glutathione. Together, they give the methylation cycle what it needs to reach its end product.
Bliss fills the gap. Nurse Doza found in practice that folate alone would move the needle — but not enough. SAMe and trimethylglycine act as methyl donors: they pick up where B9 leaves off and push the cycle forward toward its outputs — serotonin, dopamine, and glutathione. He calls Bliss the supplement that overrides poor genetics. Two ingredients. One job.
Boost is the daily drink — the methylated B vitamin complex he was sipping live during class. It contains glutathione, methylated B vitamins including folate, electrolytes, and minerals the liver needs to function. He considers it a multivitamin for the liver. He's been drinking it every day for years.
His MTHFR genetics are still severe. His homocysteine is still optimal. Those two things coexisting is the entire point.
To your health,
Baldo Co-Founder, School of Doza & MSW Nutrition
P.S. Every Wednesday, Nurse Doza hosts a LIVE AMA inside The School — no set topic, no recorded replay. Members bring questions exactly like the ones above and get answers in real time. That kind of direct access normally starts at $400 for a 30-minute private consult. Your membership includes it. Start your free trial at community.schoolofdoza.com/c/start-here