Reuteri, Sourdough and Squash Pie, Oh My!

Reuteri, Sourdough and Squash Pie, Oh My!

What do a probiotic bacterium, an ancient bread tradition, and a humble winter squash have in common? At first glance—nothing. But look a little closer, and you’ll find these foods belong together because they synergistically support gut health, blood sugar balance, and mineral absorption. In other words nutritionally, and biologically, these foods speak the same language because they contain healthy fiber and fats. They feed the right microbes as well, also known as fermentation.

Meet Lactobacillus reuteri: The Friendly Microbe With Superpowers

Lactobacillus reuteri is one of the most fascinating probiotic strains studied today—and one our ancestors almost certainly carried naturally. Research links L. reuteri to:

• Improved gut barrier function
• Immune modulation
• Hormonal signaling (including oxytocin pathways)
• Support for bone density and mineral metabolism
• Reduced inflammation in the gut and beyond

What’s especially interesting is that L. reuteri is not just another probiotic. It’s increasingly understood as a keystone organism—one that helps shape the entire microbial ecosystem.

Another characteristic is that it is a very delicate and needs the right conditions to survive and thrive. Can you imagine what anibiotics do to such a delicate microbe like L. reuteri? It’s not likely to survive many such assaults.

Bottom line? For the benefit of our microbiome it’s important to eat non processed food and organically as much as possible. That’s where sourdough and squash enter the story at least for the purposes of this article.

Why Sourdough Bread Is Different (and Why Your Body Knows It)

Almost everyone has had this experience: You eat a slice of bread. You feel heavy, foggy, bloated—or hungry again an hour later. Then, another day, you eat a piece of real sourdough… and none of that happens. It’s not your  imagination, it’s biology.

At a glance, sourdough bread and yeast bread look similar. They’re both flour, water, and leavening. But the similarity ends there. Modern commercial yeast bread is designed for speed, predictable rise, and uniform rise. Commercial yeast (Saccharomyces cerevisiae) works fast. Dough rises in hours, sometimes minutes. From an industrial standpoint, that’s efficient. But not necessarily from a digestive standpoint.

True Sourdough uses, Wild yeasts, Lactic acid bacteria, and time The dough ferments slowly—often 12 to 48 hours—while microbes do something remarkable: they pre-digest the bread for you.

Fermentation: Digestion Before Digestion

This is a key difference. In sourdough fermentation:

• Phytic acid is broken down
• Minerals like magnesium, zinc, and iron become more available
• Gluten proteins are partially dismantled
• Organic acids are produced that change how the bread behaves in your body

With yeast bread, almost none of this happens. The bread may rise, but the grain remains largely without bioavailability.

Why Sourdough Is Gentler on the Gut

Long fermentation:

• Reduces the burden on digestive enzymes
• Lowers the chance of fermentation inside your gut
• Produces lactic acid that supports a healthier gut environment

In contrast, fast-risen yeast bread often arrives in the gut unfinished, asking your body to do all the work. And your body notices. My body has certainly noticed, since my wife Victoria has started making sourdough bread from scratch. It’s been quite the science project, but well worth it!

Blood Sugar: The Quiet Difference You Feel Later

One of the most overlooked benefits of sourdough is how it affects blood sugar. Sourdough:

• Digests more slowly
• Produces a smaller glucose spike
• Leads to steadier energy

Yeast bread:

• Breaks down quickly
• Raises blood sugar faster
• Often leaves you hungry again soon after

The organic acids produced during sourdough fermentation physically slow carbohydrate absorption. Which is why sourdough tends to feel more satisfying.

Minerals Matter More Than We Think

Grains naturally contain phytic acid—a compound that binds minerals and prevents their absorption. In traditional cultures this wasn’t a problem because grains were soaked, fermented, or both.

Unfortunately, you may be eating minerals—but not absorbing them. Sourdough fermentation breaks down phytic acid, freeing minerals so your body can actually use them. Yeast bread skips this step entirely.

Our bodies, however, are still calibrated for the older method. Yeast bread asks your body to adapt; sourdough adapts to your body. Which explains why sourdough is beneficial for energy, digestion and satiety.

Butternut Squash Pie: A Dessert the Blue Zones Would Recognize

If you look at the world’s Blue Zones—places where people routinely live into their 90s and 100s—you notice something surprising. They don’t avoid dessert, what they avoid is empty sweetness. From this perspective, dessert is a moderately sweetened, seasonal, ingredient-driven treat that still behaves like food once it enters the body.

When Victoria made a Blue Zone- inspired squash pie at Christmastime, I couldn’t stop talking about it. Not only was it delicious, it actually tasted nutritious! (Shouldn’t all food be nutritious?)

Squash makes a great pie filling because it provides carbohydrates in a slow, well-buffered form. The natural sugars are bound up with water and fiber, which means they’re released gradually during digestion rather than flooding the bloodstream all at once.

This makes squash:

• Energizing without being stimulating
• Filling without being heavy
• Appropriate even for people watching blood sugar

It satisfies the palate without provoking a crash.

Fiber That Feeds, Not Ferments

Much of squash’s fiber is soluble, the kind that forms a gentle gel in the gut. This supports beneficial bacteria while avoiding the bloating and discomfort that can come from harsher fibers.This is one reason squash is often tolerated well even by people with sensitive digestion.

Rich in Carotenoids 

Minerals That Support the Nervous System

Squash contributes meaningful amounts of:

• Potassium (fluid balance, muscle and nerve function)
• Magnesium (metabolic and neuromuscular support)
• Small amounts of iron and calcium

While not a mineral powerhouse on its own, squash works synergistically with mineral-rich foods rather than blocking absorption. The nutrients in squash are generally accessible, without needing extensive processing to make them usable.

Why Squash Works So Well in Traditional Foods

Taken together, squash’s profile explains why it shows up repeatedly in traditional diets:

• It nourishes without stress
• It supports digestion rather than challenging it
• It pairs beautifully with fats, nuts, and fermented foods

One of the things I enjoyed most about this pie was the almond/pecan nut crust Ground almonds and pecans. The nuts contain healthy fats that slow digestion, natural fiber, magnesium, zinc, trace minerals, and protein. So it’s a more balanced food and a better pairing nutritionally when compared to flour crusts, and it tastes great with the squash filling, as it complements the squash’s sweetness.

This matters enormously with squash, which is rich in carotenoids that require fat for absorption. The nut crust doesn’t just frame the filling—it helps your body actually use what’s in it.

Blood Sugar: Where the Crust Really Matter

A traditional flour crust can quietly turn a balanced squash filling into a blood sugar roller coaster. Nut crusts do the opposite. because they’re low in digestible carbohydrates and high in fat and fiber. They create a much gentler metabolic response. Energy comes on steadily, without the spike-and-crash pattern so many people associate with dessert. So, you get magnesium, zinc and trace minerals, not empty calories.

If you would like more nutritional ideas that actually taste great and are good for you watch for more blog posts or better yet, email us at [email protected] and give us your feedback and suggestions. Thanks for reading.