48XP
In adults with chronic constipation, fibre supplements helped 66% of people compared with 41% on placebo; psyllium worked best, at more than 10 g a day for at least four weeks.
Fiber
Indigestible plant carbohydrates found in fruits, vegetables, and grains
Often taken withProbiotics, Berberine, High-Fibre Eating
Evidence-backed benefits
How Fiber can help, goal by goal, with the studies behind each score.
36XP
Lowers blood sugar and HbA1c a little in people with type 2 diabetes.
29XP
Soluble fibre such as psyllium lowers LDL cholesterol by a modest amount.
18XP
Lowers blood pressure by about 1 point in trials.
15XP
Small help with weight by keeping you fuller.
How to read XP
Each score is for this supplement and that specific goal, not a general rating.
XP combines how reliable the research is with how much difference it usually makes. Higher means stronger evidence for that supplement and that goal.
Limited<15 XPModest15–27 XPModerate28–44 XPReliable45–69 XPHigh70+ XP
Dosage
What studies commonly use for Fiber, and how it is usually taken.
Usual dose
5–10 g per day
5–10 g/day supplemental fiber
How to take it
- Start low
- With plenty of fluid
- Build up gradually
See study range
5–15 g/day supplemental (total dietary intake target: 25–38 g/day)
Your journey
Bowel Regularity comes first (day 7 → week 4); Fat Loss takes longest (week 4 → week 12). An estimate from the studies' timelines, not a promise: everyone responds differently.
From the first noticeable effect to roughly full strength. Colour follows the XP tier of each benefit.
Make it a habit
These gains come from steady use, not a single dose. Keep Fiber in your routine for about week 12 before you judge it.
Safety
What to know before you take Fiber.
Safety rating
Well tolerated
Mild effects, if any.
- Bloating and gasVery common at first. Build up slowly.
- Constipation without enough waterDrink plenty of fluid.
- Choking riskNever swallow the powder dry. Mix it with water.
General information, not medical advice. If you are pregnant, take medication or have a health condition, check with a doctor or pharmacist first.
Common pairings
Supplements and habits often combined with Fiber.
Probiotics
Fiber feeds the gut bacteria probiotics add
Berberine
Both studied for blood sugar and cholesterol
High-Fibre Eating
Food sources first; the supplement tops up.
Where to buy
Brands we looked at for Fiber, with our quality score for each.
Thorne
Prebiotic Fiber Powder
Quality score4.9/5
No listings for this country yet.
Authority
Public figures who take or recommend Fiber. Portraits are AI-generated, not real photos, and this is not an endorsement.
Dave Asprey
Entrepreneur
PractisesSource
Gwyneth Paltrow
Actress
PractisesSourceBuild a stack around your goals.
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