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.

Lower resting heart rate

What this outcome means

Resting heart rate is how many times your heart beats per minute when you are calm and at rest, a basic window into cardiovascular condition. On DoseRank it maps to a defined health outcome built from human studies on beats per minute at rest and baseline pulse measurements – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Elevated resting pulsePeople whose at-rest heart rate sits higher than they'd like.

Fitness trackersThose watching daily pulse trends as a marker of conditioning.

Heart-health mindedAdults keeping an eye on cardiovascular numbers over time.

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

Evidence level

92Strong

Fish Oil – has strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 27 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 ingredients

Fish Oil is the best supported ingredient signal for this outcome.

Dose mismatchDoseFit 27

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Below range: Fish Oil 800 mg vs 1000-3000 mg.

Processed

1.5k

Available

1.5k

Ingredients

Brands

238

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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Take 60-sec quiz

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.

Lower resting heart rate

What this outcome means

Who it's for

Elevated resting pulsePeople whose at-rest heart rate sits higher than they'd like.

Fitness trackersThose watching daily pulse trends as a marker of conditioning.

Heart-health mindedAdults keeping an eye on cardiovascular numbers over time.

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

Evidence level

92Strong

Best ingredients

Fish Oil is the best supported ingredient signal for this outcome.

Dose mismatchDoseFit 27

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Below range: Fish Oil 800 mg vs 1000-3000 mg.

Processed

1.5k

Available

1.5k

Ingredients

Brands

238

Coverage

100%

Relevant ingredients

Which ingredient types matter for resting heart rateOpen to see which ingredient types matter for resting heart rate

284 products across 3 ingredient types — open to filter the ranking.

Use types to filter ranked products

Fatty Acids & Lipids

14 products

Dietary fats including omega-3s and structural lipids. Look at the active EPA/DHA amounts and freshness, since oils oxidize and turn rancid.

Typical: , ,

Alkaloids & Stimulants

5 products

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

Typical: ,

Botanicals/Herbal Extracts

265 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 resting heart rate

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for resting heart rate

NOW Foods, Super Omega 3-6-9 Fish Oil, 90 Softgels

NOW Foods$0.28 / serving4.8 · 20,536Available now

Also helps with

Omega-3 index

Eczema severity

Skin barrier function

Why this ranks here

Evidence fitFish Oil is the strongest evidence signal for this outcome.
Dose fitFish Oil at 800 mg sits below the studied 1000-3000 mg window.
Price / serving$0.28 per serving — high price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

The numbers

800 mgBelow rangebelow the studied 1000-3000 mg window

800 mg

78 mg

126 mg

800 mg

160 mg

225 mg

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Swanson Vitamins, Multi Omega 3-6-9, 220 Softgels

Swanson VitaminsClinical63Dose fit27Popularity30$0.23/ serving

Swanson Vitamins, MultiOmega 3-6-9, 120 Softgels

Swanson VitaminsClinical63Dose fit27Popularity30$0.30/ serving

Nutricost, Grape Seed Extract, 240 Capsules (400 mg per Capsule)

NutricostClinical48Dose fit90Popularity84$0.07/ serving

NOW Foods, Grape Seed Extract, 500 mg, 90 Veg Capsules

NOW FoodsClinical48Dose fit91Popularity84$0.26/ serving

Micro Ingredients, Grape Seed Extract Resveratrol Red Wine Extract, 240 Capsules

Micro IngredientsClinical48Dose fit92Popularity50$0.14/ serving

NOW Foods, Grape Seed, 90 Veg Capsules

NOW FoodsClinical46Dose fit76Popularity80$0.19/ serving

Herbal Secrets, Grapeseed Extract, 400 mg, 120 Veggie Capsules

Herbal SecretsClinical48Dose fit90Popularity30$0.10/ serving

Terry Naturally, Clinical OPC®, 400 mg, 60 Softgels

Terry NaturallyClinical48Dose fit90Popularity76$0.73/ serving

NOW Foods, Blood Pressure Health, 90 Veg Capsules

NOW FoodsClinical45Dose fit67Popularity91$0.22/ serving