Psyllium Husk vs Wheat Dextrin
How psyllium husk and wheat dextrin differ in how they work, evidence, tolerance, and cost.
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Side by Side
| Psyllium Husk | Wheat Dextrin | |
|---|---|---|
| How it works | Soluble, gel-forming, minimally fermented. The gel holds water to soften hard stool and firms loose stool, and traps bile acids, which lowers LDL cholesterol. | Soluble, non-viscous, readily fermented. Dissolves clear in liquids. |
| Typical dose | 5-10 g powder 1-3 times daily with ample water | 3-6 g 1-3 times daily |
| Common uses | constipation, diarrhea and IBS, LDL cholesterol lowering, glycemic control | adding fiber grams to drinks |
| Side effects | Bloating at first; must be taken with enough water. Separate from medications by at least 2 hours. | Mild gas. |
| Cost | Low | Low |
| Also called | ispaghula, Plantago ovata | Benefiber, resistant dextrin |
When to Choose Psyllium Husk
Choose psyllium husk when you want stool normalization or cholesterol lowering with the strongest evidence. Carries an FDA-authorized health claim for coronary heart disease risk reduction. Little gas because it resists fermentation.
Psyllium Husk
The most studied supplemental fiber. It lowers LDL and normalizes stool in both directions, and it improves glycemic control in proportion to how poor that control is.
What to look for: Plain psyllium husk or powder with grams of psyllium per serving, sugar-free for daily use. Start at 3-5 g.
Find on iHerb Affiliate linkWhen to Choose Wheat Dextrin
Choose wheat dextrin when you want an invisible fiber added to drinks and are not treating constipation. Non-viscous, so it lacks the laxative and cholesterol-lowering effects of psyllium.
Wheat Dextrin
Choose wheat dextrin when you want an invisible fiber added to drinks and are not treating constipation.
What to look for: Wheat Dextrin named on the Supplement Facts panel, with the amount per serving stated.
Find on iHerb Affiliate linkProducts on Titrate
2,168 of the 214,745 labels in the NIH Dietary Supplement Label Database list fiber as an active ingredient (1,232 on market). 322 are sold as fiber products by name.
Fiber does not have its own search category yet. Each product above links to its full label in the NIH database.
Related
References
Institute of Medicine. National Academies Press, 2005. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids.
Moayyedi P, et al. The effect of fiber supplementation on irritable bowel syndrome: a systematic review and meta-analysis. Am J Gastroenterol. 2014;109(9):1367-1374.
Gibb RD, et al. Psyllium fiber improves glycemic control proportional to loss of glycemic control: a meta-analysis of data in euglycemic subjects, patients at risk of type 2 diabetes mellitus, and patients being treated for type 2 diabetes mellitus. Am J Clin Nutr. 2015;102(6):1604-1614.
McRorie JW Jr, McKeown NM. Understanding the Physics of Functional Fibers in the Gastrointestinal Tract: An Evidence-Based Approach to Resolving Enduring Misconceptions about Insoluble and Soluble Fiber. J Acad Nutr Diet. 2017;117(2):251-264.
Jovanovski E, et al. Effect of psyllium (Plantago ovata) fiber on LDL cholesterol and alternative lipid targets, non-HDL cholesterol and apolipoprotein B: a systematic review and meta-analysis of randomized controlled trials. Am J Clin Nutr. 2018;108(5):922-932.
McDonald D, et al. American Gut: an Open Platform for Citizen Science Microbiome Research. mSystems. 2018;3(3):e00031-18.
Reynolds A, et al. Carbohydrate quality and human health: a series of systematic reviews and meta-analyses. Lancet. 2019;393(10170):434-445.
Wastyk HC, et al. Gut-microbiota-targeted diets modulate human immune status. Cell. 2021;184(16):4137-4153.