Everything DoseRank tracks on the fiber shelf — Partially Hydrolyzed Guar Gum (PHGG). The category itself is never ranked: 405 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing fiber supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Microbiome diversityEcologic diversity of gut microbial communities.52 rankedModerate-strong
Stool consistencyForm or texture of stool.66 rankedStrong
SatietySense of fullness after eating.341 rankedModerate-strong
Postprandial glucoseBlood glucose after meals.314 rankedStrong
LDL cholesterolLow-density lipoprotein cholesterol; lower is often preferred.339 rankedStrong
ConstipationInfrequent, difficult, or hard bowel movements.317 rankedStrong
ThermogenesisHeat production and metabolic energy expenditure.239 rankedStrong
Resting energy expenditureCalories burned at rest; marker of basal metabolism.239 rankedStrong
Sodium statusBody sodium balance.136 rankedStrong
Hydration statusAdequacy of body water and fluid balance.136 rankedStrong
Fasting blood glucoseBlood glucose after fasting.150 rankedStrong
Total cholesterolTotal circulating cholesterol concentration.119 rankedStrong
Gastrointestinal infection incidenceFrequency of infectious GI illnesses.22 rankedStrong
Body weightTotal body mass measured over time.293 rankedModerate-strong
Potassium statusBody potassium balance.67 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best fiber supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 405 products against that goal's trials.