Rankings / Essentials — Nutrients
Fiber / psyllium husk
Essentials · Nutrient
Tier A+
Bottom line
Read Off Label grades Fiber / psyllium husk as A+ (8.4/10) based on strong evidence, high benefit magnitude, and a low-risk safety profile.
Reynolds Lancet 2019: highest-vs-lowest fiber intake associated with 15-30% reduction in all-cause and CV mortality.
Studied, labeled, or reported-use context: 25-40 g/day total (emphasize whole foods); 5-10 g psyllium for supplementation — OTC / dietary; not individualized guidance.
If you were testing this on yourself
Two properties decide whether an n-of-1 experiment is readable and recoverable. These describe the experiment — they are not a judgment about whether to run it, and nothing here is a recommendation.
Can you undo it?
Reverses on stopping
Entirely reversible, acting locally in the gut with no systemic accumulation.
Can you tell if it worked?
Readable — Days for bowel effects; 4–8 weeks and a repeat panel for lipids
Stool form and frequency; LDL cholesterol on a standard lipid panel if that is the goal.
What would fool you Adding fibre abruptly causes bloating that resolves over 1–2 weeks — quitting during that window is the usual reason people conclude it did not suit them. Lipid panels move with weight, alcohol, and recent meals, so change one thing at a time.
What the evidence says
Reynolds Lancet 2019: highest-vs-lowest fiber intake associated with 15-30% reduction in all-cause and CV mortality. Fiber from whole food > supplements.
Mechanism
Soluble fiber binds bile acids (LDL reduction); SCFA production via microbial fermentation; glycemic modulation; satiety; microbiome feeding
Studied, labeled, or reported dose & route
25-40 g/day total (emphasize whole foods); 5-10 g psyllium for supplementation
This records doses and routes described in studies, approved labeling, clinical practice, or documented use. It is not individualized guidance and does not establish safety; context changes with indication, formulation, health history, monitoring, and other medicines.
Citations
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Common questions
- What does the evidence show about Fiber / psyllium husk's effects?
- Read Off Label rates the evidence for Fiber / psyllium husk as Strong and the benefit magnitude as high, producing an overall grade of A+ (8.4/10). Reynolds Lancet 2019: highest-vs-lowest fiber intake associated with 15-30% reduction in all-cause and CV mortality.
- What safety findings are reported for Fiber / psyllium husk?
- Fiber / psyllium husk has a low risk profile in the database. Low (gas/bloating; obstruction risk without adequate fluids) Legal status: OTC / dietary.
- What doses or routes are reported for Fiber / psyllium husk?
- 25-40 g/day total (emphasize whole foods); 5-10 g psyllium for supplementation This is context from studies, approved labeling, clinical practice, or documented use; it is not individualized guidance and does not establish safety.
- How does Fiber / psyllium husk work?
- Soluble fiber binds bile acids (LDL reduction); SCFA production via microbial fermentation; glycemic modulation; satiety; microbiome feeding
This is an independent synthesis of published research by a non-clinician. Scores are opinions supported by citations, not prescriptions. See the full disclaimer and methodology for how this score was produced and what it does and doesn't mean.