Psyllium Husk ： Chronic Constipation

Multiple meta-analyses confirm psyllium significantly increases stool frequency (mean +2.4/week) and stool weight. Superior to placebo with NNT of 3 for constipation relief. Recommended by AGA and ACG guidelines.

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結論

Key Study Findings

Review

The role of dietary fiber in the gastrointestinal tract: when, how and why?

Dose: None vs: None Outcome: None 効果: None None

対象集団: Review of dietary fiber role in GI tract

Review

Dietary management of chronic constipation: a review of evidence-based strategies and clinical guidelines.

Dose: None vs: None Outcome: None 効果: None None

対象集団: Review of dietary management of chronic constipation

Review

The role and therapeutic effectiveness of Plantago ovata husk (psyllium husk) in the prevention and …

Dose: None vs: None Outcome: None 効果: None None

対象集団: Review of psyllium husk for constipation and diarrhea

Meta-Analysis n=410

Conservative, physical and surgical interventions for managing faecal incontinence and constipation in adults with central …

Dose: None vs: Placebo Outcome: Constipation symptoms 効果: SMD -0.62, 95% CI -1.10 to -0.14 None

対象集団: Alzheimer's disease patients

Randomized Controlled Trial Double-blind

The effect of fiber supplementation with agave fructans or psyllium plantago in symptoms of constipation …

Dose: None vs: None Outcome: Constipation symptoms 効果: None p > 0.05

対象集団: Constipation patients

Meta-Analysis

Systematic review and meta-analysis: Foods, drinks and diets and their effect on chronic constipation in …

Dose: Various foods, drinks, diets vs: Control diet or placebo Outcome: Stool output, transit time, symptoms, QoL 効果: None None

対象集団: Adults with chronic constipation

Key Statistics

研究数

1400

参加者数

↑

Positive

グレード

Referenced Papers

Dietary management of chronic constipation: a review of evidence-based strategies and clinical guidelines. Review

The Proceedings of … 2025 2 件の引用

The role and therapeutic effectiveness of Plantago ovata husk (psyllium husk) in the prevention and non-pharmacological treatment of gastrointestinal diseases. … Review

Przeglad gastroenterologiczny 2025 2 件の引用

The role of dietary fiber in the gastrointestinal tract: when, how and why? Review

Best practice & … 2025 1 件の引用

Comparison chart: Some drugs for irritable bowel syndrome with constipation (IBS-C). Other

The Medical letter … 2025

Drugs for irritable bowel syndrome. Other

The Medical letter … 2025

Synergistic effects of Ligilactobacillus salivarius Li01 and psyllium husk prevent mice from developing loperamide-induced constipation. Other

Food & function 2024 8 件の引用

Psyllium husk powder increases defecation frequency and faecal score, bulk and moisture in healthy cats. Other

Journal of feline … 2024 8 件の引用

[Phytotherapeutic recommendations in medical guidelines for the treatment of gastroenterological diseases - a systematic review]. Systematic Review

Zeitschrift fur Gastroenterologie 2024 3 件の引用

Conservative, physical and surgical interventions for managing faecal incontinence and constipation in adults with central neurological diseases. Meta-Analysis

The Cochrane database … 2024 3 件の引用

The effect of fiber supplementation with agave fructans or psyllium plantago in symptoms of constipation and its relation with whole … RCT

Neurogastroenterology and motility 2024 3 件の引用

Step on the accelerator: modern treatment of constipation. Review

Current opinion in … 2024 2 件の引用

Systematic review and meta-analysis: Foods, drinks and diets and their effect on chronic constipation in adults. Meta-Analysis

Alimentary pharmacology & … 2024

Effects of dietary fibers or probiotics on functional constipation symptoms and roles of gut microbiota: a double-blinded randomized placebo trial. RCT

Gut microbes 2023 143 件の引用

Dietary Fibers in Healthy Children and in Pediatric Gastrointestinal Disorders: A Practical Guide. Review

Nutrients 2023 43 件の引用

Consumption of 2 Green Kiwifruits Daily Improves Constipation and Abdominal Comfort-Results of an International Multicenter Randomized Controlled Trial. RCT

The American journal … 2023 39 件の引用

In persons with constipation or IBS-C, kiwifruit vs. psyllium increased spontaneous bowel movements. Other

Annals of internal … 2023

Psyllium: a useful functional ingredient in food systems. Review

Critical reviews in … 2022 99 件の引用

The Effect of Fiber Supplementation on Chronic Constipation in Adults: An Updated Systematic Review and Meta-Analysis of Randomized Controlled Trials. Meta-Analysis

The American journal … 2022 80 件の引用

Fiber-enriched botanicals: A therapeutic tool against certain metabolic ailments. Review

Food science & … 2022 52 件の引用

Kiwifruit and Kiwifruit Extracts for Treatment of Constipation: A Systematic Review and Meta-Analysis. Meta-Analysis

Canadian journal of … 2022 9 件の引用

Efficacy and Safety of Over-the-Counter Therapies for Chronic Constipation: An Updated Systematic Review. Systematic Review

The American journal … 2021 62 件の引用

Exploratory Comparative Effectiveness Trial of Green Kiwifruit, Psyllium, or Prunes in US Patients With Chronic Constipation. RCT

The American journal … 2021 47 件の引用

Medical Management of Constipation in Elderly Patients: Systematic Review. Review

Journal of neurogastroenterology … 2021 37 件の引用

Non-pharmacologic approach to pediatric constipation. Review

Complementary therapies in … 2021 30 件の引用

Dietary interventions and irritable bowel syndrome - what really works? Review

Current opinion in … 2021 6 件の引用

Laxative effects of wheat bran and psyllium: Resolving enduring misconceptions about fiber in treatment guidelines for chronic idiopathic constipation. Review

Journal of the … 2020 33 件の引用

Drugs for Irritable Bowel Syndrome. Other

The Medical letter … 2020

Canadian Association of Gastroenterology Clinical Practice Guideline for the Management of Irritable Bowel Syndrome (IBS). Other

Journal of the … 2019 171 件の引用

The Effect of Psyllium Husk on Intestinal Microbiota in Constipated Patients and Healthy Controls. RCT

International journal of … 2019 162 件の引用

Effect of flaxseed or psyllium vs. placebo on management of constipation, weight, glycemia, and lipids: A randomized trial in constipated … RCT

Clinical nutrition ESPEN 2019 64 件の引用

Irritable bowel syndrome and functional constipation management with integrative medicine: A systematic review. Other

World journal of … 2019 14 件の引用

Targeting patients' microbiota with probiotics and natural fibers in adults and children with constipation. Review

European review for … 2018 23 件の引用

Constipation and fecal incontinence in children with cerebral palsy. Overview of literature and flowchart for a stepwise approach. Review

Acta gastro-enterologica Belgica 2018 17 件の引用

Is Fibre an Effective Strategy to Improve Laxation in Long-Term Care Residents? Review

Canadian journal of … 2018 2 件の引用

Understanding the Physics of Functional Fibers in the Gastrointestinal Tract: An Evidence-Based Approach to Resolving Enduring Misconceptions about Insoluble and … Review

Journal of the … 2017 447 件の引用

Probiotics, fibre and herbal medicinal products for functional and inflammatory bowel disorders. Review

British journal of … 2017 145 件の引用

Management of chronic constipation in patients with diabetes mellitus. Review

Indian journal of … 2017 50 件の引用

Phosphorylation of psyllium seed polysaccharide and its characterization. Other

International journal of … 2016 69 件の引用

Fermented Fiber Supplements Are No Better Than Placebo for a Laxative Effect. Review

Digestive diseases and … 2016 28 件の引用

Use of polyethylene glycol in functional constipation and fecal impaction. Meta-Analysis

Revista espanola de … 2016 27 件の引用

Management of Constipation in Older Adults. Other

American family physician 2015

Systematic review: the effect of prunes on gastrointestinal function. Systematic Review

Alimentary pharmacology & … 2014 59 件の引用

Efficacy and complications of polyethylene glycols for treatment of constipation in children: a meta-analysis. Meta-Analysis

Medicine 2014 19 件の引用

Fiber and functional gastrointestinal disorders. Review

The American journal … 2013 421 件の引用

Treatment of irritable bowel syndrome. Review

Journal of clinical … 2011 30 件の引用

Dried plums, constipation and the irritable bowel syndrome. Other

Alimentary pharmacology & … 2011 3 件の引用

Irritable bowel syndrome: a mild disorder; purely symptomatic treatment. Other

Prescrire international 2009

Psyllium as therapeutic and drug delivery agent. Review

International journal of … 2007 375 件の引用

Constipation in long-term care. Review

Journal of the … 2007 84 件の引用

Current gut-directed therapies for irritable bowel syndrome. Other

Current treatment options … 2006 24 件の引用

[Plantago ovata]. Review

Acta chirurgica Iugoslavica 2006

[Therapeutic options of chronic constipation]. Review

Der Internist 2005 5 件の引用

Systematic review: the role of different types of fibre in the treatment of irritable bowel syndrome. Systematic Review

Alimentary pharmacology & … 2004 322 件の引用

Constipation in adults. Review

Clinical evidence 2004

Plantago ovata. (Psyllium). Review

Alternative medicine review … 2002 6 件の引用

Adverse effects of laxatives. Review

Diseases of the … 2001 199 件の引用

Constipation in Parkinson's disease: objective assessment and response to psyllium. Other

Movement disorders : … 1997 196 件の引用

Systematic review of the effectiveness of laxatives in the elderly. Systematic Review

Health technology assessment … 1997 128 件の引用

Psyllium anaphylaxis. Case Report

Allergy proceedings : … 1990 12 件の引用

Citrucel (methylcellulose/bulk-forming laxative). Other

Gastroenterology nursing : … 1989 3 件の引用

Double blind study of ispaghula in irritable bowel syndrome. CCT

Gut 1987 153 件の引用

Management of irritable bowel syndrome. Other

Biomedicine & pharmacotherapy … 1986 4 件の引用

IRRITABLE COLON. Other

JAMA 1964

Dosage & Usage

mg = milligrams · mcg = micrograms (1,000× smaller) · IU = International Units

一般的な使用量

general:: 5-10 g/day (with adequate water)
ibssupport:: 5-10 g/day (start low, titrate up over 1-2 weeks)
constipation:: 10-20 g/day in divided doses with at least 240 mL water per dose

上限量： Well-tolerated up to 30 g/day with adequate fluid intake

研究で検討された用量

用量	期間	効果	N
None	--	Mixed	--
None	--	Mixed	--
None	--	Positive	--
None	--	Mixed	410
None	--	Negative	--
Various foods, drinks, diets	--	Positive	--
None	--	Positive	--
None	1 weeks	Neutral	--

推奨摂取タイミング： With meals and a full glass of water (240 mL minimum); space 1-2 hours from medications

Safety & Side Effects

報告されている副作用

⚠ Gas and bloating (common initially; start with low dose and titrate up)
⚠ Esophageal/bowel obstruction if taken without adequate water (CRITICAL: always take with full glass of water)
⚠ Abdominal cramping at high initial doses
⚠ May reduce appetite (feeling of fullness)

既知の相互作用

● May reduce absorption of medications if taken simultaneously (space 1-2 hours)
● Lithium (reduced absorption)
● Carbamazepine (reduced absorption)
● Diabetes medications (may enhance blood sugar lowering; monitor glucose)

耐容上限摂取量： Well-tolerated up to 30 g/day with adequate fluid intake

サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。

Frequently Asked Questions

Does Psyllium Husk help with Chronic Constipation?

Based on 18 studies with 1,400 participants, there is strong evidence from multiple clinical trials that Psyllium Husk may support Chronic Constipation management. Our evidence grade is A (Strong Evidence).

How much Psyllium Husk should I take for Chronic Constipation?

Studies have used various dosages. A commonly studied range is 5-10 g/day (with adequate water). Always consult your healthcare provider before starting any supplement regimen.

Are there side effects of Psyllium Husk?

Reported side effects may include Gas and bloating (common initially; start with low dose and titrate up), Esophageal/bowel obstruction if taken without adequate water (CRITICAL: always take with full glass of water), Abdominal cramping at high initial doses, May reduce appetite (feeling of fullness). Most side effects are mild and dose-dependent. Consult your doctor if you experience any adverse reactions.

How strong is the evidence for Psyllium Husk and Chronic Constipation?

We rate the evidence as Grade A (Strong Evidence). This rating is based on 18 peer-reviewed studies with 1,400 total participants. The overall direction of effect is positive.

Related Evidence

に関する他の成分： Chronic Constipation

Inulin B Bifidobacterium lactis B Fructooligosaccharides (FOS) C

Psyllium Husk 他の症状・状態について

Irritable Bowel Syndrome (IBS) B

総合評価

Evidence Strength92%

High confidence

研究の内訳

RCT (6)Meta (6)Other (6)

代替成分との比較

この症状に対する他の成分との比較をご覧ください。

に関するすべての成分を見る： Chronic Constipation

詳しく見る

FDAに関する免責事項: これらの記述は米国食品医薬品局（FDA）による評価を受けていません。本ウェブサイトの製品および情報は、疾病の診断、治療、治癒、または予防を目的としたものではありません。表示されているエビデンスグレードは、公開された査読済み研究の分析に基づいており、医療上の助言を構成するものではありません。サプリメントの摂取を開始する前に、必ず医療専門家にご相談ください。