Form Comparison

Bifidobacterium longum 35624 vs Unstudied Multi-Strain Blends

How Bifidobacterium longum 35624 and unstudied multi-strain blends differ in how they work, evidence, tolerance, and cost.

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Quick verdict. For IBS, choose B. longum 35624. Its main trial found that 100 million CFU improved symptoms while 10 billion CFU did not, which shows that a tested formulation matters more than a big CFU number. Unstudied blends have no comparable trial and often lack strain designations.

Side by Side

Bifidobacterium longum 35624 Multi-Strain Blends (Unstudied)
How it works Acts in the gut lumen. In the main IBS trial, 100 million CFU improved symptoms and 10 billion CFU did not, likely because the high-dose capsule formulation clumped. Combinations assembled for marketing rather than tested as a product. Strain designations are often missing, and CFU may be counted at manufacture rather than expiration.
Typical dose 100 million CFU daily Varies
Common uses IBS general gut health (unproven)
Side effects Bloating. Gas, bloating.
Cost Moderate Moderate
Also called Align, B. infantis 35624 50 billion CFU blends, 10-strain formulas

When to Choose Bifidobacterium longum 35624

Choose Bifidobacterium longum 35624 when you have IBS and want a strain with a large trial. Proof that higher CFU is not automatically better.

Bifidobacterium longum 35624

One large IBS trial at a low dose. A good illustration that more CFU is not the goal.

What to look for: B. longum 35624 (Align), one capsule daily for at least four weeks.

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When to Choose Multi-Strain Blends (Unstudied)

There is rarely a reason to choose unstudied multi-strain blends: choose a strain matched to a trial instead. The trials that support probiotics tested specific strains, not blends built from their species names.

Multi-Strain Blends (Unstudied)

There is rarely a reason to choose unstudied multi-strain blends: choose a strain matched to a trial instead.

What to look for: Multi-Strain Blends named on the Supplement Facts panel, with the amount per serving stated.

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Products on Titrate

The Probiotics category in Titrate's index holds 5,145 labels from the NIH Dietary Supplement Label Database, 2,852 of them currently on market, out of 214,745 labels indexed in total.

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References

NIH Office of Dietary Supplements. Probiotics: Fact Sheet for Health Professionals.

Gionchetti P, Rizzello F, Venturi A, et al. Oral bacteriotherapy as maintenance treatment in patients with chronic pouchitis: a double-blind, placebo-controlled trial. Gastroenterology. 2000;119(2):305-309.

Whorwell PJ, Altringer L, Morel J, et al. Efficacy of an encapsulated probiotic Bifidobacterium infantis 35624 in women with irritable bowel syndrome. Am J Gastroenterol. 2006;101(7):1581-1590.

Hill C, Guarner F, Reid G, et al. Expert consensus document: The International Scientific Association for Probiotics and Prebiotics consensus statement on the scope and appropriate use of the term probiotic. Nat Rev Gastroenterol Hepatol. 2014;11(8):506-514.

Szajewska H, Kołodziej M. Systematic review with meta-analysis: Saccharomyces boulardii in the prevention of antibiotic-associated diarrhoea. Aliment Pharmacol Ther. 2015;42(7):793-801.

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Ford AC, Harris LA, Lacy BE, Quigley EMM, Moayyedi P. Systematic review with meta-analysis: the efficacy of prebiotics, probiotics, synbiotics and antibiotics in irritable bowel syndrome. Aliment Pharmacol Ther. 2018;48(10):1044-1060.

Guo Q, Goldenberg JZ, Humphrey C, El Dib R, Johnston BC. Probiotics for the prevention of pediatric antibiotic-associated diarrhea. Cochrane Database Syst Rev. 2019;4(4):CD004827.

Su GL, Ko CW, Bercik P, et al. AGA clinical practice guidelines on the role of probiotics in the management of gastrointestinal disorders. Gastroenterology. 2020;159(2):697-705.