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Psyllium husk

Supplement fiber gutheart & metabolic
Aka: psyllium husk, ispaghula, Metamucil, Fybogel
Brands seen in Singapore: NOW Foods, Organic India, Swanson Vitamins, Yerba Prima, 21st Century
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Constipation · LDL and total cholesterol fall in trials
When to take
Morning and evening, preferably after a meal
Take with
At least 150 ml of cold water · plenty of fluid daily
Pros & cons
Pros
  • Bulks stool with fluid so it comes out softer
  • LDL and total cholesterol fell across 41 RCTS
  • Usually works in 2 or 3 days
Cons
  • Main side effects are wind and bloating
  • Breathing in the powder can trigger mild allergy
  • Can change how other medicines are absorbed
Sources
  1. NHS — About Fybogel (ispaghula husk) (page last reviewed 13 January 2026) · read 2026-08-27
    what it says
    “a laxative taken to treat constipation … works by bulking poo up with fluid so that it's softer … usually takes 2 or 3 days to work … main side effects are wind and bloating”
  2. NHS — About Fybogel (ispaghula husk), Key facts (page last reviewed 13 January 2026) · read 2026-08-27
    what it says
    “It's possible to have a mild allergic reaction to Fybogel such as itchy eyes, nose or skin. To help avoid this, try not to breathe in the powder.”
  3. NHS — How and when to take Fybogel (page last reviewed 13 January 2026) · read 2026-08-27
    what it says
    “for adults and children aged 12 years and over – 1 sachet of granules twice a day … Add at least 150ml of cold water … drink more than 2 litres, or around 8 glasses, of fluid each day”
  4. NHS — Who can and cannot take Fybogel (page last reviewed 13 January 2026) · read 2026-08-27
    what it says
    “tell your doctor or pharmacist before taking Fybogel if you have … any changes in your poo, such as having blood in it … muscle weakness of the bowel (colonic atony) … difficulty swallowing or any throat problems … phenylketonuria”
  5. NHS — Taking Fybogel with other medicines and herbal supplements (page last reviewed 13 January 2026) · read 2026-08-27
    what it says
    “Fybogel can change the way some medicines work … lithium … carbamazepine … digoxin … insulin or any other medicine for diabetes … mesalazine … take it more than an hour before or after you take Fybogel”
  6. Psyllium supplementation and lipid profiles: systematic review and dose-response meta-analysis of randomized controlled trials (Genes & Nutrition, 2025; PMID 41366295) · read 2026-08-27
    what it says
    “41 Randomized Controlled Trials articles and 2049 participants were included. Psyllium showed a significant decrease in Low-Density Lipoprotein Cholesterol and total Cholesterol, a nonsignificant reduction in Triglyceride”
  7. FDA — Daily Value on the Nutrition and Supplement Facts Labels, 'Current Daily Value' table (Dietary Fiber row) · read 2026-08-27
    what it says
    “Nutrient | Current Daily Value … Dietary Fiber | 28g”
  8. HSA — Health Supplements Guidelines GL-CHPB-3-001 Rev. 020 (January 2026), s3 working definition + clause 4.8 (Tables 4–5 cover vitamins and minerals only) · read 2026-08-27
    what it says
    “a. Vitamins, minerals, amino acids, fatty acids, enzymes, probiotics and other bioactive substances … 4.8 HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5”
  9. HSA — Guidelines on Prohibited and Restricted Ingredients in Health Supplements and Traditional Medicines, GL-CHPB-1-012 Rev. 001 (October 2025), clause 1.3 + Annex A/B · read 2026-08-27
    what it says
    “The objective of this guideline is to highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list [no psyllium, ispaghula or Plantago row in Annex A or B]”
  10. iHerb Singapore — 'Psyllium Husk' category page (Herbs), default order, 63 results · read 2026-08-27
    what it says
    “NOW Foods, Whole Psyllium Husks … Organic India, Psyllium, Whole Husk Fiber … Swanson Vitamins, Psyllium Husks, 610 mg … Yerba Prima, Psyllium Whole Husks … 21st Century, Psyllium Fiber”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.