Expert Q&A

Do these brands of S boulardii use CNCM I-745 during the weight loss plateau phase

Understanding S. Boulardii and the CNCM I-745 Strain

As the founder of CFP Weight Loss, I've seen thousands of adults aged 45-54 hit a weight loss plateau despite doing everything right. One question that surfaces often is whether specific Saccharomyces boulardii brands using the CNCM I-745 strain can help. This unique yeast probiotic, also known as S. boulardii CNCM I-745, has been studied for its ability to support gut barrier function and reduce inflammation—factors that directly impact metabolic slowdown during plateaus.

In my book, I emphasize that hormonal changes, particularly declining estrogen and rising cortisol, make fat loss harder after 45. The CNCM I-745 strain stands out because it survives stomach acid exceptionally well, reaching the intestines where it helps rebalance the microbiome. Research shows it can reduce gut permeability by up to 40% in some studies, which is crucial when joint pain and blood sugar issues compound weight struggles.

How CNCM I-745 May Support Plateau Breaking

During a plateau, your body often resists further loss due to adaptive thermogenesis and imbalanced gut bacteria. Brands that specifically use the CNCM I-745 strain, such as Florastor Daily Probiotic, deliver a clinically relevant 5 billion CFU per capsule. This dose has been associated with improved insulin sensitivity and better management of blood pressure—key concerns for our community managing diabetes alongside weight.

From my methodology, I recommend pairing this probiotic with my simple 3-phase eating approach that requires no complex meal plans. Users often report reduced bloating within 10-14 days, which can restart scale movement. Unlike many probiotics that die in acidic conditions, CNCM I-745 remains viable, making it ideal for those embarrassed about their progress or overwhelmed by conflicting advice.

Which Brands Use This Specific Strain?

Not all S. boulardii products are equal. Florastor is the primary over-the-counter brand in the United States that guarantees the CNCM I-745 strain. Other generic versions may claim S. boulardii but rarely specify this patented strain. When selecting, look for "CNCM I-745" on the label to ensure you're getting the researched form. I advise starting with one capsule daily alongside meals to minimize any initial digestive adjustment.

Remember, insurance rarely covers these supplements, so choose wisely. Combine with gentle movement that respects joint pain—my approach focuses on 15-minute daily walks rather than intense gym schedules. This strain may also help stabilize blood sugar responses, preventing the crashes that lead to cravings during plateaus.

Practical Integration into Your Weight Loss Journey

Incorporate CNCM I-745 during weeks 8-12 when progress typically stalls. Track not just weight but also energy, joint comfort, and waist measurements. Many in our program see a 2-4 pound shift within three weeks of consistent use when paired with my hormone-friendly nutrition principles. Avoid taking it with hot beverages, as heat can deactivate the yeast. For best results, use for at least 30 days while following the anti-inflammatory food guidelines in my methodology.

This isn't a miracle cure but a targeted tool that addresses the gut-hormone axis many diets ignore. If you've failed every diet before, this strain's ability to support microbiome diversity offers a fresh starting point without adding time-consuming routines.

💬 What the Community Says

The community shows cautious optimism about S. boulardii CNCM I-745 for plateaus. Many 45-54 year olds on forums report modest scale movement (2-5 lbs) after 3-4 weeks with Florastor, especially when dealing with hormonal shifts or blood sugar issues. A common theme is appreciation for its survival through stomach acid compared to other probiotics. However, experiences are mixed—some see no change and feel it's another expensive disappointment given insurance doesn't cover it. Joint pain sufferers note easier digestion but question if results justify the cost. Beginners often debate strain specificity, with a vocal group insisting only true CNCM I-745 works while others report success with generic S. boulardii. Overall, it's viewed as a helpful adjunct rather than a standalone solution, particularly for those overwhelmed by nutrition advice.
Clark, R. (2026). Do these brands of S boulardii use CNCM I-745 during the weight loss plateau pha. *CFP Weight Loss*. https://blog.cfpweightloss.com/ask/do-these-brands-of-s-boulardii-use-cncm-i-745-during-the-weight-loss-plateau-phase
Russell Clark, FNP-C, APRN
About the Author

Russell Clark, FNP-C, APRN, is the founder of CFP Weight Loss in Nashville and CFP Fit Now telehealth. Over 35 years in healthcare — Army Nurse Reserves, Level 1 trauma ER, hospitalist — he developed a 30-week protocol integrating real foods, detox, and low-dose tirzepatide cycling that has helped hundreds of patients lose 30–90 pounds. He and his wife Anne-Marie lost a combined 275 pounds using the same protocol.

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