Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Flax fiber, derived from flaxseeds, is primarily used for its high content of soluble and insoluble dietary fiber. The scientific rationale for using flax fiber to support or treat hemorrhoids is rooted in its ability to soften stool and increase its bulk, thereby making bowel movements easier and reducing straining—one of the main aggravating factors for hemorrhoids. Multiple clinical guidelines and studies endorse the use of fiber supplementation, including flax fiber, as a first-line conservative treatment for symptomatic hemorrhoids. For instance, a systematic review published in the American Journal of Gastroenterology (2005) found that fiber supplementation decreased the risk of persistent symptoms and bleeding in patients with hemorrhoids by about 50%. While the bulk of research has focused on fiber in general, rather than specifically on flax fiber, flax is recognized as an effective source of both soluble and insoluble fibers, which are beneficial for bowel regularity. The evidence supporting flax fiber’s use is therefore extrapolated from broader studies on dietary fiber and hemorrhoidal disease, with some studies and authoritative health sources listing flaxseed or flax fiber among recommended fiber sources. However, direct high-quality randomized controlled trials specifically investigating flax fiber for hemorrhoids are limited. Thus, the use of flax fiber for hemorrhoid management is supported by a moderate level of scientific evidence.

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