Xylooligosaccharides

Xylooligosaccharides (XOS) are low-dose prebiotic carbohydrates fermented by beneficial gut bacteria.

Also known as: XOS, Prebiotic Xylooligosaccharides, PreticX

Xylooligosaccharides, usually shortened to XOS, are a family of short-chain prebiotic carbohydrates built from xylose units. They are not digested like ordinary sugar; instead, they reach the lower gut where beneficial bacteria can ferment them.

That is the useful part for beverages. XOS can deliver a prebiotic story at relatively low gram doses compared with heavier fibers like inulin, which is why it shows up in lighter sodas and functional drinks that do not want a thick mouthfeel or a huge fiber load. Bloom Pop uses the patented PreticX form, positioning it as a gut-health ingredient without turning the drink into a high-fiber soda.

Human research is still narrower than the marketing language around the category, but the direction is credible. A 2016 human study using XOS-enriched rice porridge found increases in fecal Lactobacillus and Bifidobacterium counts along with lower Clostridium perfringens after six weeks. A 2023 review describes XOS as resistant to digestion in the upper GI tract and fermentable by probiotic bacteria, especially Bifidobacterium and Lactobacillus. A 2025 Food & Function review summarizes broader in vitro, animal, and human evidence around microbiome modulation, short-chain fatty acid production, and metabolic-health markers.

The sober read: XOS is a real prebiotic ingredient with a legitimate mechanism, but a single soda should be treated as dietary support, not a gut-health intervention. Dose, total diet, and consistency matter.

References

  1. Lin, Shyh-Hsiang, et al. "Prebiotic Effects of Xylooligosaccharides on the Improvement of Microbiota Balance in Human Subjects." Gastroenterology Research and Practice, 2016. https://doi.org/10.1155/2016/5789232
  2. Divyashri, G., et al. "The Potential of Xylooligosaccharides as Prebiotics and Their Sustainable Production: A Review." Foods, 2023. https://doi.org/10.3390/foods12142681
  3. Nogueira-Prieto, Natalia-Maria, et al. "A Review of the Capacity of Xylooligosaccharides to Modulate Gut Microbiota and Promote Health." Food & Function, 2025. https://doi.org/10.1039/D5FO00169B