Psyllium husk (Metamucil)
Fiber supplement. Adds bulk to stool and promotes bowel regularity. Not absorbed systemically. No direct brain effect — does not cross the blood–brain barrier.
Benefits
A psyllium bulk-forming fiber that normalizes stool and lowers LDL cholesterol.
Risks
Requires adequate water; may cause gas or bloating and can interfere with drug absorption if taken at the same time.
Informational only — not medical advice.
Body systems
Organs
Where to buy
Popular Psyllium husk (Metamucil) products on Amazon. Not medical advice — talk to a clinician before starting a supplement.
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Research (3)
- Nutrition, Physical Activity and Supplementation in Irritable Bowel Syndrome Radziszewska et al. (2023) PubMed ↗
- Psyllium: a useful functional ingredient in food systems Belorio et al. (2022) PubMed ↗
- Psyllium PubMed ↗
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