Is a higher dose always better?

No. Dose-fit rewards landing inside the range studied for the outcome — over-dosing (common with melatonin) or under-dosing both lower the score. The goal is the effective dose, not the biggest number.

What does the Value score mean?

The Value score compares a product's price per serving with clinically relevant products ranked for the same outcome. A score of 50 is the typical price; above 50 means better value than typical, while below 50 means the product costs more than typical. It is a 0–100 value signal, not a percentile.

Why is the cheapest product not #1?

Cost is only one input. The cheapest pick here is a citrate form with weaker absorption and a stock-risk flag, so it leads on Value-for-cost but trails on the composite that also weighs evidence, dose fit and availability.

Are these affiliate links?

Retailer links may be affiliate links and DoseRank may earn a commission. Rankings and placement are determined by the scoring model only — never by payment from a brand.

Is this medical advice?

No. DoseRank summarizes evidence to help you choose; it is not a substitute for a clinician, especially if you are pregnant, breastfeeding, on medication, or managing a health condition.

Support healthy body weight

What this outcome means

Body weight is your total body mass and how it shifts up or down as the weeks go by. On DoseRank it maps to a defined health outcome built from human studies on measured body mass, weight change over time, and body-composition shifts – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Daily scale-watchersTracking the number closely as it trends over months.

Plateau frustrationWeight that stalls and refuses to move either way.

Hard-to-gain typesStruggling to add mass despite eating more.

Stack buildersAlready taking supplements such as Glucomannan and want the dose right.

Evidence level

78Moderate-strong

Glucomannan – has moderate public evidence for this outcome. This usually means there are smaller or mechanistic studies, but not randomized human trials. A DoseFit Score of 67 means this product's ingredient forms and doses are close to what was used in the studies behind this ranking - DoseRank weights each product ingredient.

Best available ingredients

Glucomannan is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Glucomannan 2000 mg vs 2000-4000 mg.

Processed

3.5k

Available

3.5k

Ingredients

Brands

342

Coverage

100%

How to read the scores

What every metric means

Each score is 0–100. Higher is better for every metric below.

CompositeThe overall DoseRank score — a weighted blend of clinical strength, evidence, dose fit, trust and value.Higher is better

ClinicalHow strongly the formula's ingredients and doses match what clinical studies used for this outcome.Higher is better

EvidenceHow much published human research backs the formula's key ingredients for this outcome — both how many studies exist and how strong they are.Higher is better

ValueHow the price per serving compares with similar products for this outcome — 50 is the typical price, higher means better value for your money.Higher is better

TrustHow well customers rate this product, with extra weight given to ratings backed by a large number of reviews.Higher is better

PopularityHow strongly this product sells compared with the other ranked products for this outcome.Higher is better

This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →

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Get a personal report

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

Frequently asked

Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value. 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.

Support healthy body weight

What this outcome means

Who it's for

Daily scale-watchersTracking the number closely as it trends over months.

Plateau frustrationWeight that stalls and refuses to move either way.

Hard-to-gain typesStruggling to add mass despite eating more.

Stack buildersAlready taking supplements such as Glucomannan and want the dose right.

Evidence level

78Moderate-strong

Best available ingredients

Glucomannan is the best supported ingredient signal for this outcome.

Dose partly matchedDoseFit 67

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Glucomannan 2000 mg vs 2000-4000 mg.

Processed

3.5k

Available

3.5k

Ingredients

Brands

342

Coverage

100%

Relevant ingredients

Which ingredient types matter for body weightOpen to see which ingredient types matter for body weight

22 products across 2 ingredient types — open to filter the ranking.

Use types to filter ranked products

Fibers & Prebiotics

20 products

Indigestible carbs that feed gut bacteria and add bulk. Start low and ramp slowly – too much too fast means bloating and gas.

Typical:

Alkaloids & Stimulants

2 products

Plant-derived nitrogen compounds like caffeine that stimulate the nervous system. Effective but dose-sensitive, with real tolerance and dependence risk.

Typical:

Top decision cards

Best products for body weight

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for body weight

NOW Foods, Glucomannan, Pure Powder, 8 oz (227 g)

NOW Foods$0.14 / serving4.6 · 2,103Available now

Also helps with

Satiety

Total cholesterol

Why this ranks here

Evidence fitGlucomannan has moderate human evidence for this outcome.
Dose fitGlucomannan at 2000 mg lands inside the studied 2000-4000 mg window.
Price / serving$0.14 per serving — mid price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustSolid trust signals from buyer ratings, with room to grow.

The numbers

2000 mgIn rangeinside the studied 2000-4000 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Nutricost, Glucomannan, Unflavored, 17.9 oz (500 g)

NutricostClinical55Dose fit67Popularity50$0.10/ serving

Nature's Way, Glucomannan from Konjac Root, 100 Vegan Capsules (665 mg per Capsule)

Nature's WayClinical55Dose fit67Popularity76$0.34/ serving

Best Naturals, Konjac Root Glucomannan, 1 lb (454 g)

Best NaturalsClinical55Dose fit67Popularity30$0.11/ serving

Best Naturals, Konjac Root, 180 Vegetarian Capsules (666 mg per Capsule)

Best NaturalsClinical55Dose fit67Popularity50$0.19/ serving

Vitacost, Glucomannan, 180 Capsules (666 mg per Capsule)

VitacostClinical55Dose fit67Popularity30$0.20/ serving

Natural Balance, Glucomannan™, Maximum Strength, 90 Capsules (666 mg per Capsule)

Natural BalanceClinical55Dose fit67Popularity30$0.55/ serving

Nutricost, Glucomannan Konjac Root Extract, 180 Capsules (600 mg per Capsule)

NutricostClinical44Dose fit44Popularity89$0.25/ serving

NOW Foods, Glucomannan, 575 mg, 180 Veg Capsules

NOW FoodsClinical40Dose fit37Popularity96$0.26/ serving

Nutricost, Berberine HCl With Ceylon Cinnamon, 120 Capsules

NutricostClinical19Dose fit76Popularity91$0.37/ serving