How does DoseRank decide what ranks #1?

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.

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.

DOSERANKEVIDENCE-BASED SUPPLEMENTS

Reduce withdrawal symptoms

DOSERANKEVIDENCE-BASED SUPPLEMENTS

Best Supplements for Withdrawal symptoms — 484 Ranked | DOSERANK

Top decision cards

Best products for withdrawal symptoms

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for withdrawal symptoms

Frontier Co-op, Cut & Sifted Passion Flower Herb, 16 oz (453 g)

Frontier Co-op$0.04 / serving4.7 · 480Available now

Also helps with

Calmness or relaxation

Anxiety symptoms

Sleep quality

Why this ranks here

Evidence fitEvidence is still thin for Passionflower.
Dose fitPassionflower at 1.1 g is higher than the studied 0.3-0.8 g window.
Price / serving$0.04 per serving — low 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

1.1 gAbove rangehigher than the studied 0.3-0.8 g window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Swanson Vitamins, Full Spectrum® Passion Flower, 500 mg, 60 Capsules

Swanson VitaminsClinical68Dose fit76Popularity89$0.08/ serving

Solaray, True Herbs, Passion Flower, 100 VegCaps (350 mg per VegCap)

SolarayClinical69Dose fit85Popularity80$0.23/ serving

NOW Foods, Passion Flower, 350 mg, 90 Veg Capsules

NOW FoodsClinical69Dose fit85Popularity68$0.26/ serving

Nutricost, Passion Flower Extract, 1,500 mg, 120 Capsules

NutricostClinical67Dose fit70Popularity84$0.07/ serving

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, Alcohol-Free, 2,000 mg, 1 fl oz (30 ml)

Nature's AnswerClinical70Dose fit94Popularity80$0.76/ serving

Vitacost, Passion Flower, 300 Capsules (350 mg per Capsule)

VitacostClinical69Dose fit85Popularity50$0.08/ serving

Oregon's Wild Harvest, Organic Passionflower, 90 Organic Vegan Capsules (400 mg per Capsule)

Oregon's Wild HarvestClinical70Dose fit90Popularity50$0.46/ serving

Nature's Answer, Passionflower, 60 Vegetarian Capsule (250 mg per Capsule)

Nature's AnswerClinical68Dose fit76Popularity50$0.38/ serving

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, 2,000 mg, 1 fl oz (30 ml)

Nature's AnswerClinical70Dose fit94Popularity30$0.68/ serving

Top decision cards

Best products for withdrawal symptoms

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for withdrawal symptoms

Frontier Co-op, Cut & Sifted Passion Flower Herb, 16 oz (453 g)

Frontier Co-op$0.04 / serving4.7 · 480Available now

Also helps with

Calmness or relaxation

Anxiety symptoms

Sleep quality

Why this ranks here

Evidence fitEvidence is still thin for Passionflower.
Dose fitPassionflower at 1.1 g is higher than the studied 0.3-0.8 g window.
Price / serving$0.04 per serving — low 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

1.1 gAbove rangehigher than the studied 0.3-0.8 g window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Swanson Vitamins, Full Spectrum® Passion Flower, 500 mg, 60 Capsules

Swanson VitaminsClinical68Dose fit76Popularity89$0.08/ serving

Solaray, True Herbs, Passion Flower, 100 VegCaps (350 mg per VegCap)

SolarayClinical69Dose fit85Popularity80$0.23/ serving

NOW Foods, Passion Flower, 350 mg, 90 Veg Capsules

NOW FoodsClinical69Dose fit85Popularity68$0.26/ serving

Nutricost, Passion Flower Extract, 1,500 mg, 120 Capsules

NutricostClinical67Dose fit70Popularity84$0.07/ serving

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, Alcohol-Free, 2,000 mg, 1 fl oz (30 ml)

Nature's AnswerClinical70Dose fit94Popularity80$0.76/ serving

Vitacost, Passion Flower, 300 Capsules (350 mg per Capsule)

VitacostClinical69Dose fit85Popularity50$0.08/ serving

Oregon's Wild Harvest, Organic Passionflower, 90 Organic Vegan Capsules (400 mg per Capsule)

Oregon's Wild HarvestClinical70Dose fit90Popularity50$0.46/ serving

Nature's Answer, Passionflower, 60 Vegetarian Capsule (250 mg per Capsule)

Nature's AnswerClinical68Dose fit76Popularity50$0.38/ serving

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, 2,000 mg, 1 fl oz (30 ml)

Nature's AnswerClinical70Dose fit94Popularity30$0.68/ serving

Reduce withdrawal symptoms

Reduce withdrawal symptoms

Which ingredient types matter for withdrawal symptomsOpen to see which ingredient types matter for withdrawal symptoms

Alkaloids & Stimulants

Botanicals/Herbal Extracts

Best products for withdrawal symptoms

Frontier Co-op, Cut & Sifted Passion Flower Herb, 16 oz (453 g)

Swanson Vitamins, Full Spectrum® Passion Flower, 500 mg, 60 Capsules

Solaray, True Herbs, Passion Flower, 100 VegCaps (350 mg per VegCap)

NOW Foods, Passion Flower, 350 mg, 90 Veg Capsules

Nutricost, Passion Flower Extract, 1,500 mg, 120 Capsules

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, Alcohol-Free, 2,000 mg, 1 fl oz (30 ml)

Vitacost, Passion Flower, 300 Capsules (350 mg per Capsule)

Oregon's Wild Harvest, Organic Passionflower, 90 Organic Vegan Capsules (400 mg per Capsule)

Nature's Answer, Passionflower, 60 Vegetarian Capsule (250 mg per Capsule)

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, 2,000 mg, 1 fl oz (30 ml)

What every metric means

Compare the top 3, side by side

Not sure which is right for you?

Get a personal report

Frequently asked

Which ingredient types matter for withdrawal symptomsOpen to see which ingredient types matter for withdrawal symptoms

Alkaloids & Stimulants

Botanicals/Herbal Extracts

Compare the top 3, side by side

Best products for withdrawal symptoms

Frontier Co-op, Cut & Sifted Passion Flower Herb, 16 oz (453 g)

Swanson Vitamins, Full Spectrum® Passion Flower, 500 mg, 60 Capsules

Solaray, True Herbs, Passion Flower, 100 VegCaps (350 mg per VegCap)

NOW Foods, Passion Flower, 350 mg, 90 Veg Capsules

Nutricost, Passion Flower Extract, 1,500 mg, 120 Capsules

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, Alcohol-Free, 2,000 mg, 1 fl oz (30 ml)

Vitacost, Passion Flower, 300 Capsules (350 mg per Capsule)

Oregon's Wild Harvest, Organic Passionflower, 90 Organic Vegan Capsules (400 mg per Capsule)

Nature's Answer, Passionflower, 60 Vegetarian Capsule (250 mg per Capsule)

Nature's Answer, Passionflower Aerial Parts, Fluid Extract, 2,000 mg, 1 fl oz (30 ml)