Xylooligosaccharide

Key takeaways

Xylooligosaccharide belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Xylooligosaccharide to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Xylooligosaccharide from memory before moving on to harder problems.

Reference excerpt

Xylooligosaccharides (XOS) are polymers of the sugar xylose. They are produced from the xylan fraction in plant fiber. Their C5 (where C is a quantity of carbon atoms in each monomer) structure is fundamentally different from other prebiotics, which are based upon C6 sugars. Xylooligosaccharides have been commercially available since the 1980s, originally produced by Suntory in Japan. They have more recently become more widely available commercially, as technologies have advanced and production costs have fallen. Some enzymes from yeast can exclusively convert xylan into only xylooligosaccharides-DP-3 to 7. Xylooligosaccharides act as a prebiotic, selectively feeding beneficial bacteria such as bifidobacteria and lactobacilli within the digestive tract. A large number of clinical trials have been conducted with XOS, demonstrating a variety of health benefits, including improvements in blood sugars and lipids, digestive health benefits, laxation, and beneficial changes to immune markers. These health benefits have typically been observed at 1–4 g/d, a lower dose than required for prebiotics such as fructooligosaccharides and inulin.

See also OroFructooligosaccharide – Oligosaccharide fructans (FOS) Galactooligosaccharide – Class of prebiotics (GOS) Isomaltooligosaccharide – Mixture of short-chain carbohydrates (IMO)

References

Bibliography Chung, Y-C; Hsu, C-K; Ko, C-Y; Chan, Y-C (2007). "Dietary intake of xylooligosaccharides improves the intestinal microbiota, fecal moisture, and pH value in the elderly". Nutr Res. 27 (12): 756–61. doi:10.1016/j.nutres.2007.09.014. Childs, CE; Roytio, H; Alhoniemi, E; Fekete, AA; Forssten, SD; Hudjec, N; et al. (2014). ""Xylo-oligosaccharides alone or in synbiotic combination with Bifidobacterium animalis subsp. lactis induce bifidogenesis and modulate markers of immune function in healthy adults " a double-blind, placebo-controlled, randomised, factorial cross-over study". Br J Nutr. 111 (11): 1945–56. doi:10.1017/S0007114513004261. PMID 24661576. S2CID 28575826. Cloetens, L; Broekaert, WF; Delaedt, Y; Ollevier, F; Courtin, CM; Delcour, JA; et al. (2010). ""Tolerance of arabinoxylan-oligosaccharides and their prebiotic activity in healthy subjects " a randomised, placebo-controlled cross-over study". Br J Nutr. 103 (5): 703–13. doi:10.1017/S0007114509992248. PMID 20003568. Finegold, SM; Li, Z; Summanen, PH; Downes, J; Thames, G; Corbett, K; et al. (2014). "Xylooligosaccharide increases bifidobacteria but not lactobacilli in human gut microbiota". Food Funct. 5 (3): 436–45. doi:10.1039/c3fo60348b. PMID 24513849. Francois, IEJA; Lescroart, O; Veraverbeke, WS; Marzorati, M; Possemiers, S; Evenepoel, P; et al. (2012). ""Effects of a wheat bran extract containing arabinoxylan oligosaccharides on gastrointestinal health parameters in healthy adult human volunteers " a double-blind, randomised, placebo-controlled, cross-over trial". Br J Nutr. 108 (12): 2229–42. doi:10.1017/S0007114512000372. hdl:1854/LU-3140491. PMID 22370444. S2CID 10359052. Iino, T; Nishijima, Y; Sawada, S; Sasaki, H; Harada, H; Suwa, Y; et al. (1997). "Improvement of Constipation by a Small Amount of Xylooligosaccharides Ingestion in Adult Women". J Japanese Assoc Diet Fiber Res. 1: 19–24. doi:10.11217/jjdf1997.1.19. Kajihara, M; Kato, S; Konishi, M; Yamagishi, Y; Horie, Y; Ishii, H (2000). "Xylooligosaccharide decreases blood ammonia levels in patients with liver cirrhosis". Am J Gastroenterol. 95 (9): 2514. doi:10.1111/j.1572-0241.2000.02712.x. S2CID 33589050. Lecerf, J-M; Depeint, F; Clerc, E; Dugenet, Y; Niamba, CN; Rhazi, L; et al. (2012). "Xylo-oligosaccharide (XOS) in combination with inulin modulates both the intestinal environment and immune status in healthy subjects, while XOS alone only shows prebiotic properties". Br J Nutr. 108 (10): 1847–58. doi:10.1017/S0007114511007252. PMID 22264499. Lin, S-H; Chou, L-M; Chien, Y-W; Chang, J-S; Lin, C-I (2016). "Prebiotic Effects of Xylooligosaccharides on the Improvement of Microbiota Balance in Human Subjects". Gastroenterol Res Pract. 6: 1–6. doi:10.1155/2016/5789232. PMC 5019895. PMID 27651791. Maki, KC; Gibson, GR; Dickmann, RS; Kendall, CWC; Chen, C-YO; Costabile, A; et al. (2012). "Digestive and physiologic effects of a wheat bran extract, arabino-xylan-oligosaccharide, in breakfast cereal". Nutrition. 28 (11–12): 1115–21. doi:10.1016/j.nut.2012.02.010. PMID 22771050. Na, MH; Kim, WK (2007). "Effects of xylooligosaccharide intake on fecal Bifidobacteria, lactic acid and lipid metabolism in Korean young women". Kor J Nutr. 40: 154–61. doi:10.1097/01.NPT.0000288316.43613.63. Sheu, WH-H; Lee, I-T; Chen, W; Chan, Y-C (2008). "Effects of xylooligosaccharides in type 2 diabetes mellitus". J Nutr Sci Vitaminol (Tokyo). 54 (5): 396–401. doi:10.3177/jnsv.54.396. PMID 19001772. Tateyama, I; Hashii, K; Johno, I; Iino, T; Hirai, K; Suwa, Y; et al. (2005). "Effect of xylooligosaccharide intake on severe constipation in pregnant women". J Nutr Sci Vitaminol (Tokyo). 51 (6): 445–8. doi:10.3177/jnsv.51.445. PMID 16521705. S2CID 45484490. Yang, J; Summanen, PH; Henning, SM; Hsu, M; Lam, H; Huang, J; et al. (2015). ""Xylooligosaccharide supplementation alters gut bacteria in both healthy and prediabetic adults " a pilot study". Front Physiol. 6: 216. doi:10.3389/fphys.2015.00216. PMC 4528259. PMID 26300782.

Illustrations

Worked examples

Example 1 — a first encounter with Xylooligosaccharide

Start with the simplest possible case. Write down what Xylooligosaccharide claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Xylooligosaccharide before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Xylooligosaccharide ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Xylooligosaccharide

In research: Xylooligosaccharide appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Xylooligosaccharide in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Xylooligosaccharide is common in secondary-school and first-year university syllabi. It links to neighbouring topics Oligosaccharides, so understanding it makes those chapters shorter.
In everyday life: Look for Xylooligosaccharide outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

How to study Xylooligosaccharide in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Xylooligosaccharide means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Xylooligosaccharide out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Xylooligosaccharide in simple terms?

Xylooligosaccharides (XOS) are polymers of the sugar xylose. They are produced from the xylan fraction in plant fiber.

Why does Xylooligosaccharide matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Xylooligosaccharide?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Xylooligosaccharide.