The Microbiome Doctor: Doctors Were Wrong! The 3 Foods You Should Eat For Perfect Gut Health!

Here’s a wild link to open with: flossing is tied to a big drop in dementia risk, which pushed me to dig into the gut–brain connection we’ve ignored for decades.

So if we want healthy brains, what should we actually do?

Food is the lever; simple changes can shift mood, energy, and long‑term brain risk more than people realize.

Part of my drive is personal: my mum’s in her nineties with dementia, and a mini‑stroke years ago put my own brain on my radar.

Is dementia really rising, or are we just better at spotting it?

It’s rising beyond aging alone, and it’s one of our biggest shared fears.

What did your brain workup show?

No high‑risk Alzheimer’s genes, but I’ve got cardiovascular and diabetes risk that leans me toward vascular dementia, so I’m optimizing everything I can now.

How has your view of the brain shifted in the last few years?

I stopped seeing the brain as a sealed control tower; it’s just another organ responding to body signals, especially from the gut via the vagus nerve.

In our studies, people changed their diet and the first wins weren’t on lab tests but on mood, energy, and hunger, which reframed depression and fatigue as brain responses to body inflammation and metabolism.

I notice bad food and bad sleep tank my mood; people rarely think that’s gut‑related.

We see it again and again, even in families on ultra‑processed diets; switch the food, and within weeks they’re less irritable, more awake, and finally connect how they feel to what they eat.

And the cycle of lousy sleep and sugar cravings keeps it going.

Exactly; poor sleep pushes you to quick sugar, which stokes the same system that drives low mood and fatigue.

Is stress basically a brain story or a body story?

It’s a body story that hits the brain; immune activation sends signals that shift behavior, which we saw with short dips in mood after vaccines that mirror longer inflammatory depression in some people.

Across brain disorders, genetics mostly point to a general vulnerability, not neat disease boxes, which fits an immune‑metabolic model better than a simple chemical‑imbalance story.

You’ve said Parkinson’s may start in the gut.

Many who develop it had gut issues a decade earlier, plus the same misfolded proteins show up in the intestine and appear to climb the vagus nerve to the brain; a gut‑friendly diet could help delay or prevent it.

So what’s the plan for the rest of us?

Be mindful before you eat and build a diverse plant diet; different microbes act like tiny pharmacies that thrive on variety and crowd out the ones that love junk.

Does quitting a food kill its pet microbe?

It usually dips but doesn’t vanish; feeding a broad range of plants brings rare species back online and supports immunity.

Is coffee bad for brain blood flow?

Long‑term studies show benefits for many people, but reactions vary; if caffeine makes you anxious or wrecks sleep, adjust or try gentler options.

You tested a prebiotic blend, right?

Yes; over six weeks a diverse, food‑like prebiotic shifted many more helpful microbes and boosted fullness, energy, and mood earlier than a single‑strain probiotic.

What’s the difference between prebiotics and probiotics?

Prebiotics feed your resident microbes; most probiotics pass through and likely nudge immune cells in the small intestine more than they colonize.

Think of the gut’s layout and nerves, plus the oral microbiome; neglected gums inflame, bad actors move, and brain risk rises, which makes oral care part of brain care.

Why do we even need microbes?

We co‑evolved; the gut forms early to train immunity and shape brain development, and even our cellular powerhouses began as microbes.

Give me more of your core rules.

Eat fermented foods daily; a tightly controlled study showed they lower inflammation, and options like kefir, sauerkraut, kimchi, miso, and proper cheeses are easy wins.

Avoid zero‑fat products that swap fat for fillers; choose real food.

Pivot protein toward beans, legumes, mushrooms, and whole grains so you get fiber for your microbes along with protein.

Focus on quality, not calories; strict calorie cutting backfires because hunger roars back.

Steer clear of high‑risk ultra‑processed foods with additives and engineered textures that make you overeat; sturdier breads like rye or sourdough beat fluffy white loaves.

Many people blame gluten when the real culprits are emulsifiers, sugars, and other additives in the combo.

Nuts, especially mixed, support brain and gut health and actually satisfy.

Eat natural colors for polyphenols and give your gut an overnight rest; time‑restricted eating helps many, but it’s personal.

You’ve become keto‑curious.

The epilepsy evidence is strong; ketones can reset brain energy, and short, occasional stints might help mood or focus if we protect the microbiome at the same time.

Cycling keto quiets cravings for me and sharpens thinking, which helps me break out of food spirals.

That’s the intriguing middle path; long‑term keto is rough and gut‑unfriendly, but brief resets could be useful, though we need better trials.

You found high microplastics in your blood.

Likely from years of city cycling; I filter water and avoid plastics, but proven removal therapies are lacking and pricey.

What about GLP‑1 medications for weight loss?

They’ll reshape obesity care and may protect the brain, but users need diet education during the hunger‑quiet window; we should also watch how they affect motivation and risk‑taking long term.

You also sauna for brain health.

Twice a week feels great and likely trains blood vessels; cold after is optional.

And you rate social life highly.

Strong, regular connection tracks with long life and happier brains, while loneliness is brutal.

What did we miss?

Early trauma can lock inflammation high for years and raise risk across brain disorders, and talk therapy can genuinely lower those markers, which fits a whole‑body model.

What are you uncontainably excited about?

That food, used like medicine, can transform lives fast; seeing that change in real people keeps me fired up.

It’s still hard to choose well in a world primed for cravings, so I plan my food environment like a system to give myself a real chance.

Pair knowledge with tricks and habits, remove junk from homes and offices, and change cues like we did with cigarettes to make better choices the default.

Your books are linked below; thank you for guiding so many of us toward better health, and here’s to more connection.