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.

Reduce psoriasis symptoms

What this outcome means

Psoriasis severity describes how widespread and inflamed psoriatic skin patches are, from a few small plaques to large, scaly, irritated areas. On DoseRank it maps to a defined health outcome built from human studies on PASI scores, plaque coverage, and lesion redness and scaling – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Flare-prone skinPatches that worsen in cycles of redness, scaling, and itch.

Widespread plaquesLesions covering larger areas of the body and scalp.

Stubborn patchesPersistent lesions that linger despite ongoing skin care.

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

Evidence level

78Moderate-strong

Oregon Grape – 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

Oregon Grape 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: Oregon Grape 500 mg vs 500-1500 mg.

Processed

Available

Ingredients

Brands

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 →

Not sure which is right for you?

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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.

Reduce psoriasis symptoms

What this outcome means

Who it's for

Flare-prone skinPatches that worsen in cycles of redness, scaling, and itch.

Widespread plaquesLesions covering larger areas of the body and scalp.

Stubborn patchesPersistent lesions that linger despite ongoing skin care.

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

Evidence level

78Moderate-strong

Best available ingredients

Oregon Grape 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: Oregon Grape 500 mg vs 500-1500 mg.

Processed

Available

Ingredients

Brands

Coverage

100%

Relevant ingredients

Which ingredient types matter for psoriasis severityOpen to see which ingredient types matter for psoriasis severity

20 products across 1 ingredient types — open to filter the ranking.

Use types to filter ranked products

Botanicals/Herbal Extracts

20 products

Concentrated plant and herbal extracts standardized to actives. Potency depends on the extract ratio and marker content, not raw weight.

Typical:

Top decision cards

Best products for psoriasis severity

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for psoriasis severity

Nature's Way, Oregon Grape, 500 mg, 90 Vegan Capsules

Nature's Way$0.07 / serving4.5 · 488Available now

Why this ranks here

Evidence fitOregon Grape has moderate human evidence for this outcome.
Dose fitOregon Grape at 500 mg lands inside the studied 500-1500 mg window.
Price / serving$0.07 per serving — mid price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustMixed trust signals — ratings are positive but the base is limited.

The numbers

500 mgIn rangeinside the studied 500-1500 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Oregon's Wild Harvest, Organic Oregon Grape, 90 Organic Vegan Capsules (380 mg per Capsule)

Oregon's Wild HarvestClinical87Dose fit82Popularity30$0.72/ serving

Solaray, True Herbs, Oregon Grape, 400 mg, 100 VegCaps

SolarayClinical61Dose fit27Popularity30$0.14/ serving

Solaray, Berberine with Oregon Grape, 60 VegCaps

SolarayClinical27Dose fit7Popularity76$0.36/ serving

Buried Treasure, Liquid Advantage, ACF Immune Support, 16.54 fl oz (496 ml)

Buried TreasureClinical10Dose fit2Popularity30$1.71/ serving

Eclectic Herb, Vita Biotic, Supports Immunity, 150 Veg Caps

Eclectic HerbClinical8Dose fit1Popularity30$0.79/ serving

Plnt, Liver Support, 90 Vegetarian Capsules

PlntClinical1Dose fit0Popularity30$0.24/ serving

Source Naturals, Inflama-Rest™, 60 Tablets

Source NaturalsClinical1Dose fit0Popularity30$1.22/ serving

Source Naturals, Liver Guard™, 120 Tablets

Source NaturalsClinical0Dose fit0Popularity30$0.57/ serving

Source Naturals, Liver Guard™, Silymarin, CoQ10, N-Acetyl Cysteine Complex, 60 Tablets

Source NaturalsClinical0Dose fit0Popularity30$0.59/ serving