XOS

XOS is an acronym used for a variety of concepts across different domains, and there is no single, universally accepted definition. In practice, XOS most commonly refers to xylo-oligosaccharides in the context of nutrition and health, but the term is also used as a project name or product designation in technology and industry.

Xylo-oligosaccharides (XOS) are short chains of xylose molecules derived from plant xylan. They are produced by enzymatic or chemical hydrolysis of xylan-rich materials such as hardwoods or agricultural byproducts. As prebiotics, XOS are fermented by beneficial gut bacteria, particularly Bifidobacteria, and are studied for potential effects on digestive health, mineral absorption, and immune function. They are sold as ingredients for functional foods and dietary supplements. Regulatory status varies by jurisdiction; some regions classify XOS as dietary fiber or as permissible prebiotic ingredients, with labeling requirements on dosage and suitable applications. Consumption is generally considered safe for most adults, though higher doses can cause gastrointestinal symptoms in some individuals. Safety in specific populations, such as infants or individuals with certain conditions, may require caution or professional guidance.

In technology and industry, XOS is used as an acronym in multiple, unrelated contexts. It is the name or shorthand for several operating systems, software platforms, or network-management tools developed by different vendors or research groups. Because there is no standard definition, XOS-derived products differ in architecture, compatible hardware, and licensing terms.

Outside computing and nutrition, XOS appears in company names, product lines, or research projects. The lack of a canonical meaning means that case-specific clarification is typically required to determine which XOS is being referenced.