VSL#3 vs Visbiome: Which High-Potency Probiotic Should You Take?
VSL#3 vs Visbiome: Which High-Potency Probiotic Should You Take?
By Dr. Onikepe Adegbola, MD PhD — Johns Hopkins-trained physician-scientist
The VSL#3 vs Visbiome story is one of the most confusing in the probiotic world — and for good reason. They're the same original formula that went through a messy legal dispute. Understanding which one contains the original De Simone Formulation matters for anyone relying on the clinical evidence.
Key Takeaways
- The original formulation studied in clinical trials (the "De Simone Formulation") is now in Visbiome, not VSL#3
- VSL#3 changed its manufacturing in 2016 and no longer contains the exact formula from the research
- Both contain high-potency multi-strain blends (450-900 billion CFU) but from different production facilities
- If you're choosing based on published evidence, Visbiome has a stronger claim to the studied formula
- For a more affordable multi-strain probiotic, consider physician-formulated probiotics with gut-friendly design
Quick Comparison
| Feature | VSL#3 (current) | Visbiome |
|---|---|---|
| Original De Simone formula | No (changed 2016) | Yes |
| CFU count | 112.5-900 billion | 112.5-900 billion |
| Number of strains | 8 | 8 |
| Requires refrigeration | Yes | Yes |
| Cost (30-day) | $50-60 | $60-70 |
| Best evidence for | General high-potency use | Ulcerative colitis, pouchitis (studied formula) |
The Backstory
Professor Claudio De Simone developed the original 8-strain, high-potency probiotic formula in Italy. For years, it was licensed and sold as VSL#3 in the US. In 2016, following a dispute between De Simone and the VSL#3 brand holders, De Simone moved his original formulation to a new product: Visbiome.
VSL#3 continued being sold but manufactured by a different company with what may be a different production process. Courts ruled that the clinical evidence from published studies (including the landmark pouchitis and UC trials) applies to the De Simone Formulation — which is now Visbiome.
When These Matter
High-potency probiotics like these (450+ billion CFU) are specifically indicated for:
- Ulcerative colitis (maintenance of remission)
- Pouchitis (after surgery for UC)
- IBS (some evidence, particularly for bloating)
For general IBS and digestive health maintenance, most patients don't need 450 billion CFU. A well-designed multi-strain formula at standard potency — like Advanced Probiotics GI Support — provides effective support at a fraction of the cost without refrigeration requirements.
FAQ
Is VSL#3 the same as Visbiome?
No — not since 2016. Visbiome now contains the original De Simone Formulation that was used in clinical trials. VSL#3 is manufactured differently. If the clinical evidence matters to your decision, Visbiome is the product that matches the research.
Which is better for IBS?
If you specifically want the studied formula, Visbiome. But for most IBS patients, a more affordable multi-strain probiotic is equally appropriate. See our Align vs Culturelle comparison and our Florastor vs Culturelle guide for more options.
This article is educational only. Probiotic selection for IBD should be made with your gastroenterologist. Do not change your IBD treatment plan without medical guidance.
