Improve erectile function

What this outcome means

Erectile function is your ability to get and keep an erection firm enough for satisfying sex. On DoseRank it maps to a defined health outcome built from human studies on IIEF questionnaire scores, erection hardness ratings, and penile blood flow – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Age-related declineFirmness that has softened gradually with each passing decade.

Performance worryStress or anxiety in the moment that derails arousal.

Circulation-linkedMen with blood-pressure or vascular issues affecting blood flow.

Stack buildersAlready taking supplements such as L-Citrulline and want the dose right.

Evidence level

78Moderate-strong

L-Citrulline – 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 77 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

L-Citrulline is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 77

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Below range: L-Citrulline 3 g vs 1500-5000 g.

Processed

Available

Ingredients

Brands

267

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?

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.

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.

Improve erectile function

What this outcome means

Who it's for

Age-related declineFirmness that has softened gradually with each passing decade.

Performance worryStress or anxiety in the moment that derails arousal.

Circulation-linkedMen with blood-pressure or vascular issues affecting blood flow.

Stack buildersAlready taking supplements such as L-Citrulline and want the dose right.

Evidence level

78Moderate-strong

Best available ingredients

L-Citrulline is the best supported ingredient signal for this outcome.

Dose matchedDoseFit 77

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: Below range: L-Citrulline 3 g vs 1500-5000 g.

Processed

Available

Ingredients

Brands

267

Coverage

100%

Relevant ingredients

Which ingredient types matter for erectile functionOpen to see which ingredient types matter for erectile function

1.7k products across 2 ingredient types — open to filter the ranking.

Use types to filter ranked products

Amino Acids & Derivatives

1k products

The building blocks of protein, taken singly for targeted effects – leucine for muscle, theanine for calm. Free-form versions absorb fast on an empty stomach.

Typical: ,

Botanicals/Herbal Extracts

644 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 erectile function

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for erectile function

Nutricost, L-Citrulline, Unflavored , 1.3 lb (600 g)

Nutricost$0.13 / serving4.8 · 1,271Available now

Why this ranks here

Evidence fitL-Citrulline has moderate human evidence for this outcome.
Dose fitL-Citrulline at 3 g sits below the studied 1500-5000 mg window.
Price / serving$0.13 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustSolid trust signals from buyer ratings, with room to grow.

Trade-offs

Trust signals sit below the other picksEvidence depth trails the rest of this list

The numbers

3 gBelow rangebelow the studied 1500-5000 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products