Dr. Svea Ogilvie, ND

02/21/2026

02/21/2026

The Microbiota–Gut–Brain Axis (MGBA)

The MGBA is a complex, integrated system spanning the gut and brain. This bidirectional communication network integrates microbial, neural, immune, and endocrine signals between the gastrointestinal tract and central nervous system. Major pathways include the vagus nerve, circulating cytokines, microbial metabolites (e.g., short-chain fatty acids), and modulation of the blood–brain barrier (BBB). The MGBA influences neurodevelopment, immune activation, neuroinflammation, and neurotransmission.

In summary, the MGBA comprises: (i) the gut microbiota; (ii) the intestinal barrier and mucosal immune system; (iii) circulating immune cells and cytokines; (iv) the ENS and vagus nerve connecting to (v) central autonomic circuits and HPA stress pathways; and (vi) CNS interfaces (BBB, microglia, etc.) that sense peripheral signals. Disruption of any one component (for example, gut dysbiosis or a “leaky” gut lining) can reverberate throughout this interconnected system.

Reference: Chen et al. (2025)

02/18/2026

02/18/2026

When stress feels uncontrollable, your brain actually shifts who’s in charge.

High stress chemicals shut down the prefrontal cortex — the part that helps you think clearly, plan, stay calm, and make good decisions.

At the same time, they ramp up the amygdala and habit centers — the parts of the brain focused on fear, emotional reactions, and survival patterns.

This creates a loop:
Stress → more stress chemicals → less clear thinking → stronger emotional reactions → even more stress.

So instead of responding thoughtfully, you’re more likely to:
• react emotionally
• fall into old habits
• feel overwhelmed
• struggle to focus or regulate yourself

This isn’t a personal failure — it’s brain biology in survival mode.

The good news: when safety and regulation are restored, the thinking brain comes back online.

Under conditions of uncontrollable stress, there is a high level of catecholamine release in the brain, which impairs prefrontal cortex (PFC) function while strengthening the affective responses of the amygdala and the habitual responses of the basal ganglia. The amygdala plays a central role in this process by activating catecholamine systems during psychological stress and by coordinating other components of the stress response, such as projections to the periaqueductal gray.

Activation of the amygdala stimulates the locus coeruleus through corticotropin-releasing factor (CRF), increasing tonic firing and leading to elevated norepinephrine (NE) release. High levels of NE engage lower-affinity alpha-1 and beta receptors, which further enhance amygdala activity and weaken PFC regulation. This creates a vicious cycle in which primitive emotional and habitual circuits dominate behavior, while higher-order cognitive control is suppressed.

Reference: Arnsten, A. F. T., et al. (2015). ). The effects of stress exposure on prefrontal cortex: Translating basic research into successful treatments for post-traumatic stress disorder. Neurobiology of Stress

02/11/2026

The Pancreas: An Unsung Hero of Digestion

Every time you eat, your pancreas releases powerful digestive enzymes into the small intestine to break food down into nutrients your body can actually absorb:

🔹 Amylase → breaks down starch/carbohydrates → glucose
🔹 Lipase → breaks down fats → fatty acids + glycerol
🔹 Proteases (trypsin, chymotrypsin, peptidases) → break down proteins → amino acids

Without enough of these enzymes, food isn’t fully digested — it ferments, irritates the gut lining, feeds dysbiosis, and triggers inflammation.

⚠️ Low enzyme output can lead to:
• Bloating
• Gas
• Greasy or floating stools
• Nutrient deficiencies
• Fatigue
• Food sensitivities

👉 Example: Gluten

Gluten is a complex protein. It requires strong pancreatic proteases to be properly broken into small peptides.

If protease activity is low:
• gluten is only partially digested
• larger protein fragments cross the gut barrier
• the immune system flags them as “foreign”
• inflammation occurs and symptoms develop

This is one reason some people experience non-celiac gluten sensitivity — not necessarily an autoimmune issue, but a digestive insufficiency issue.

Sometimes the problem isn’t the food…
It’s incomplete digestion.

Supporting pancreatic function can include:
✓ mindful eating & chewing
✓ stomach acid support
✓ bitter herbs
✓ adequate minerals
✓ digestive enzymes when needed
✓ reducing chronic stress (vagus nerve tone matters)

Healthy digestion = better absorption = less inflammation.

Your pancreas does more than you think. 💛

Image CTTO

02/09/2026

Your muscles clear glucose in two different ways after a meal.
Most people only use one.

When you sit after eating, glucose disposal depends almost entirely on insulin signaling from the pancreas. That pathway works, but it has limited capacity, which is why post-meal glucose spikes are higher and longer.

When you move after eating, even lightly, a second pathway turns on in parallel.

Muscle contraction independently activates glucose transporters (GLUT4), allowing glucose to enter muscle without waiting for insulin. The result is faster clearance, lower peaks, and less strain on the pancreas.

What’s happening under the hood:
• Muscle contraction triggers GLUT4 translocation
• Glucose enters muscle directly
• Blood glucose falls more quickly
• Insulin demand is reduced, not replaced

This isn’t about burning calories or “earning” food. It’s about using the physiology you already have. Walking after meals doesn’t override insulin. It adds another clearance pathway.

That’s why timing matters.

02/09/2026

✨ Where you absorb your nutrients matters more than you think…

This diagram shows exactly where vitamins, minerals, fats, proteins, and carbohydrates are absorbed along the small intestine.

🟢 Duodenum → iron, calcium, magnesium, fat-soluble vitamins
🟢 Jejunum → most vitamins, minerals, carbs, amino acids
🟢 Ileum → B12, bile salts, vitamin D & K
🟢 Colon → water, electrolytes, short-chain fatty acids from your microbiome

If inflammation, infection, surgery, stress, mold exposure, or dysbiosis affects these areas, nutrient deficiencies can happen even with a “perfect” diet.

That’s why gut health isn’t just digestion — it’s:
✔ energy
✔ hormones
✔ immunity
✔ brain function
✔ detox capacity

As Hippocrates said:
“All disease begins in the gut.”

Heal the terrain → improve absorption → support the whole body.

IMAGE CTTO

02/09/2026

In 2025, research confirms that polyunsaturated fats (PUFAs) play opposing roles in inflammation: omega-3 fatty acids (found in fish) reduce inflammation and combat metabolic disease, while excess omega-6s (found in vegetable oils) may promote it, particularly when the ratio of omega-6 to omega-3 is too high (typically over 20:1 in Western diets). Maintaining a lower, balanced ratio is critical for reducing chronic, low-grade inflammation.

Key Findings on PUFAs and Inflammation in 2025:

Omega-3 Fatty Acids (Anti-inflammatory): EPA and DHA from marine sources are highlighted for mitigating obesity-related inflammation, improving insulin sensitivity, and reducing cardiovascular risk. They work by reducing, rather than just treating, adipose tissue inflammation and improving metabolic health.

Omega-6 Fatty Acids (Pro-inflammatory): While necessary for health in moderation, excessive intake of linoleic acid and arachidonic acid (common in processed vegetable oils) is associated with increased inflammatory responses.

Balanced Ratios and Mechanisms: The ideal ratio of omega-6 to omega-3 is closer to 4:1 or lower. High omega-6 intake can lead to elevated pro-inflammatory mediators, worsening chronic conditions.

Therapeutic Potential: Studies are actively exploring how, in addition to dietary intake, supplementation with specialized pro-resolving mediators (SPMs) can directly interrupt pain and inflammation cycles in human trials, overcoming metabolic limitations in converting dietary PUFAS.

https://www.mdpi.com/3403376

https://www.mdpi.com/3403376

Disclaimer: This information is for educational purposes based on research available up to early 2025 and does not constitute medical advice.

02/08/2026

Fear fruit because of the sugar? That same sugar is how antioxidants can enter cells to quench uncontrolled oxidation.

So do yourself a favour and stop fearing fruit. 🍉 🍓🍇🍎🍊

One of the deadliest things about our diets is not eating enough fruits. Worldwide, if humanity ate more fruits, we might save an estimated 1.7 million lives a year.

What about the sugar in fruits?

The fructose found naturally in fruits is packaged with fiber and antioxidants, which may help to explain why people experience positive health benefits when they eat fruits. Adding berries to a meal can help blunt an insulin spike from high glycemic foods, for instance. The fiber in fruits can help slow the release of the sugar, and fruit phytonutrients can help inhibit the transportation of sugar through our intestinal walls into our bloodstream.

Industrial fructose, such as added sugar, table sugar, and high fructose corn syrup, is associated with declining liver function and hypertension. Additionally, industrial fructose may impact body weight, blood pressure, insulin levels, and lipid levels. So, we should strive to cut down on processed, added sugars in our diet.

Learning to use fruits as sweeteners is one way to add more fruits into our diet while also lowering the amount of added sugars. Swap in date paste, dates, or ripe bananas, for example, in place of maple syrup or table sugar. At first, recipes may not seem as sweet, but, within a few weeks, your taste buds will adjust.

See the following videos to learn more:
"If Fructose Is Bad, What About Fruit?" at https://bit.ly/2nPCyZw
"How Much Fruit Is Too Much?" at https://bit.ly/3kGLPP4
PMID: 30954305, 39645376, 23365108, 22854401, 20564476, 23933265, 21621801, 24065788
healthdata.org