Dr. Boz Takes Methylene Blue and Her Brain Goes Into Hyperdrive. She Watched Herself Teaching at 2x Speed (Here’s Why She Uses It)

In a recent conversation between metabolic health physicians, Dr. Annette Bosworth—known widely as Dr. Boz—shared her evidence-based approach to supplements, fasting strategies, and reversing chronic disease.

The discussion, which spanned everything from vitamin D to controversial topics like cannabis use, offered rare insight into how frontline doctors are tackling metabolic illness.

What emerged wasn’t just a list of recommendations, but a philosophy grounded in measurable outcomes and clinical experience.

For anyone seeking practical, science-backed guidance on optimizing health through metabolic interventions, this conversation delivered.

The Supplement Stack That Actually Matters

Dr. Boz doesn’t take supplements lightly. Despite living in sunny Florida, she discovered through repeated testing that her vitamin D levels plummeted without supplementation.

Every data point says if it’s less than 50, you’re compromising brain health. So, I’ve gone through seasons where I’m like, I’m going to do it without supplements, and then boom, back down to 32, 45, even in a ketogenic state.

Her solution? K2D3 combination therapy—something she believes she’ll stay on indefinitely. The vitamin K2 works synergistically with D3 to support both brain health and bone density, particularly important for women post-menopause.

Methylene Blue: The Cognitive Enhancer With Blue Side Effects

Perhaps the most surprising revelation was Dr. Boz’s use of methylene blue for cognitive enhancement and ADHD management.

I started out with the dropper, and I would have yellow teeth and blue teeth and blue thumb.

She eventually switched to concentrated wax forms that dissolve under the tongue, avoiding first-pass liver metabolism. The results were dramatic—perhaps too dramatic at first.

The first time I took it, I felt high. I was leading a class, and I went back and watched myself on the recording, and I’m like, I’m speaking at two times speed.

She doesn’t use it daily, but strategically deploys it during energy dips or when intense focus is required.

The Creatine Conundrum

While acknowledging incredible data supporting creatine for brain health, Dr. Boz remains pragmatic about its real-world application. The issue? Gut tolerance.

Many patients, if they haven’t really restored that gut health, they just poop out what you swallow. It’s just such a laxative for most patients.

For those who can tolerate it—particularly athletes or during jet lag—she sees benefits. But the standard recommendation of sipping 5-10 grams over several hours doesn’t align with how most people actually live their lives.

Fish Oil for Family History

Dr. Boz measures omega-3 levels and supplements when patients can’t consume enough sardines—which, realistically, is a lot of sardines.

The conversation revealed a deeply personal motivation behind supplementation strategies. With a strong family history of Alzheimer’s, she takes an empiric approach to DHA supplementation.

I will tell you when I’m 100 years old whether or not it worked. If I can tell you at 100 that it worked, then it worked.

Magnesium: Beyond the Pill

While she keeps magnesium supplements on hand, Dr. Boz advocates for something more holistic: Epsom salt float therapy.

I find it really that whole person improvement where you slow down, take a break, vacation in an hour.

The sensory deprivation combined with magnesium absorption through the skin provides benefits that transcend simple supplementation. She recommends five floats in three weeks for patients with elevated cortisol.

The Cannabis Warning Nobody Wants to Hear

Dr. Boz pulled no punches on THC, drawing from neuroscience data that contradicts popular narratives.

How long does THC stay in the human brain? Three months. And when you have that fat-soluble molecule in your brain for those three months, your brain does not get to mature or develop.

She went classroom to classroom warning parents that THC’s impact on developing brains is worse than alcohol, despite having inferior public relations.

For adults using cannabis products for pain or sleep, she referenced Dr. Daniel Amen’s brain imaging work showing visible defects in chronic users—holes in the myelin sheath where fat-soluble THC accumulates.

When you’re done playing that game and you actually want to help that child’s brain, you come back to me.

GLP-1 Agonists: The Parkinson’s Connection

The discussion turned to emerging GLP-1 medications like retatrutide, with Dr. Boz expressing cautious optimism based on Parkinson’s research—not just weight loss outcomes.

I’ve got several of them where they were on five of the Parkinsonian drugs. Now they’re on one and they are using tirzepatide.

This raises a crucial question: if GLP-1 agonists work for neurodegenerative diseases by reversing insulin resistance, doesn’t that confirm Parkinson’s and Alzheimer’s are metabolic diseases?

By that logic, a ketogenic diet—which also reverses insulin resistance—should offer similar neuroprotection. Dr. Boz’s clinical experience supports exactly that.

The Challenge of Clinical Application

Dr. Boz acknowledged the tension between waiting for peer-reviewed studies and helping patients now.

There’s nobody out there teaching that or studying that, but it is my responsibility as a provider to say, let me do this in a careful and thoughtful way.

Her solution? Publishing case studies on Substack rather than navigating the glacial peer-review process. Twelve cases in 2026 is her goal.

The Dr. Boz Ratio: Your Daily Metabolic Report Card

Rather than prescribing exact macronutrient ratios, Dr. Boz teaches patients to interpret their own metabolic state through morning measurements.

The Dr. Boz ratio divides fasting glucose by fasting ketones. A number above 80 indicates too much insulin—whether from late eating, excess carbohydrates, or too much protein.

When every morning you wake up, your ketones are 0.3 and your glucose is north of 100, you’re doing it wrong.

This approach liberates patients from rigid meal plans while providing objective feedback. Did yesterday’s food choices improve your health or compromise it? The morning numbers tell the story.

The Protein Recycling Nobody Calculates

When patients obsess over protein intake, Dr. Boz reminds them of autophagy—the cellular recycling process that reuses protein.

Nobody is calculating how much protein did you recycle because you reused protein. The best way you can do that is to make sure you’re in a ketogenic state.

When Fasting Works—And When It Doesn’t

Dr. Boz reserves the word “fasting” for 36 hours or beyond. Anything less is just food cycling.

But here’s the critical caveat: don’t fast until you’re already producing good ketones.

If you are insulin resistant and you’re full of insulin, it hurts. It’s not fun. It really is difficult.

For metabolically healthy individuals, she advocates routine pulsing—regular 36-hour fasts to accelerate reversal of medical problems. But this rhythm only works after establishing a solid ketogenic foundation.

Fasting as Metabolic Stress, Not Punishment

When someone carries 60, 70, even 180 pounds of excess weight accumulated over decades of insulin resistance, Dr. Boz doesn’t want to spend the next 40 years reversing it gradually.

I need you to give a pulse of your metabolic stress frequently enough that you start reversing medical problems.

The goal isn’t celebration at the end of a 36-hour fast. It’s establishing a rhythm where metabolic stress becomes a tool for cellular repair and hormone optimization.

The Vegetarian Dilemma

When vegetarian patients request menu planning, Dr. Boz is blunt.

I tell them I’m not your girl. To get to a sustainable palatable menu that keeps you in a ketogenic state without using animal products, I’m not your girl.

However, the conversation acknowledged that with strategic use of eggs and high-fat dairy like paneer (30% fat versus cottage cheese’s 4%), a ketogenic vegetarian approach can work for some populations.

The key remains the same: measure morning glucose and ketones to determine if your approach is working, regardless of food philosophy.

Cortisol, Sleep, and the 15 Neural Pathways to Joy

Dr. Boz rarely discusses cortisol directly. Instead, she focuses on sleep hygiene and developing diverse sources of reward.

There should be about 15 different neural pathways that deliver joy in your life. And when you were 12, if you had the perfect life, you were developing all of them at once.

When carbohydrates or alcohol become the dominant pathway to pleasure, those other 14 routes atrophy. Recovery requires intentionally exercising underdeveloped pathways—competition, storytelling, service, friendship.

They won’t feel rewarding at first. That’s the point.

Carbohydrates as Drug, Not Food

The framework presented positions carbohydrate dependence as analogous to substance abuse—characterized by drug-seeking behavior, instant gratification, and endorphin reward loops.

Removing this “drug” creates an emotion management deficit that must be addressed through developing alternative neural pathways for joy, not just dietary restriction.

The Humility Medicine Needs

What distinguished this conversation was mutual acknowledgment that clinical practice requires adapting to new evidence—even when it contradicts previous beliefs.

If there were more physicians who had that humility, the ability to say, this is what I used to think, here’s what I’m doing now, here’s what I’m learning now.

Dr. Boz’s approach isn’t about perfection. It’s about measurable outcomes, patient-specific adaptation, and the courage to practice outside conventional protocols when clinical results justify it.

Her final assessment captured the philosophy underlying everything discussed: measure, adapt, and teach with humility what works in real clinical practice—not what textbooks claim should work in theory.