The Gut You Can Trust (and Test)

By Dr. Kathryn Dundas | Sublime Life

Slow Age with Intention

If your skin is acting up… your gut might be whispering. If your immune system’s on edge… it’s probably shouting.

This week, the science is loud and clear: your gut microbiome is the root system of your health. And the exciting part? You can now test it—and even contribute to research shaping the future of medicine.

At Sublime, we offer microbiome testing that analyzes what’s happening in your large intestine. It’s a stool test that can reveal clues about inflammation, dysbiosis, immune response, and even why your skin might be struggling. If you’ve been navigating eczema, acne, fatigue, food triggers, or autoimmune flares—this is worth investigating.

But here’s where it gets even more interesting...

I’m advising on a new clinical trial at the University of Calgary that’s exploring the small intestine microbiome—a much harder place to reach, but critically important for understanding things like SIBO, bloating, and nutrient absorption. The researchers are using a fascinating little capsule (think: science-meets-magic) that collects samples as it moves through your small bowel. If you think you may be a candidate, we can connect you directly with the team.

Gut–Skin–Immune: The Real Triangle

Science now shows what we’ve always sensed: your gut microbes are chemical messengers. They produce things like short-chain fatty acids and postbiotic compounds that lower inflammation, repair skin, and keep your immune system from overreacting. One study even shows UVB light exposure on skin can positively shift your gut microbes. Everything is connected.

Stress + Gut = A Real Thing

If your digestion tanks every time life gets chaotic, you’re not imagining it. Stress rewires how your gut moves, secretes, and absorbs. It can literally shift your microbiome overnight. Which is why nervous system care—your breath, your sleep, your rituals—is gut care.

What You Can Do This Week:

• Get tested. Start with our large intestine stool test to map your microbiome.

• Reach out if you suspect SIBO—we may be able to connect you to the Calgary small bowel trial.

• Use your breath. Slow down meals. Soothe your gut with presence.

• Support your flora. Try adding fermented foods or targeted probiotics.

• Listen to your skin. It’s your gut’s messenger, not your enemy.

Practitioner Picks:

The GI Microbiome Test

A deep-dive stool analysis for inflammation, bacterial balance, and food reactivity. Insightful for those with skin, autoimmune, or digestive concerns.

UltraFlora Probiotic

A clinically researched daily probiotic designed to support immune balance, gut integrity, and a healthy microbiome. A gentle, go-to support for skin, digestion, and calm.

If you’ve been feeling like something’s “off,” trust your gut. And know that now—finally—science is catching up to what your body has known all along.

Let’s get you back in balance,

Dr. K. Dundas MD, CCFP

Founder, CEO, Medical Director