The short answer · Erectile function
Take l-citrulline for erectile function. This is the one to buy.

Nutricost, L-Citrulline, Unflavored , 1.3 lb (600 g)
4.8· 1,330 ratings· $0.13/serving
L-Citrulline 3 g — below the studied 1500-5000 mg window
Of 1,966 products scored for Erectile function, Nutricost, L-Citrulline, Unflavored , 1.3 lb (600 g) ranks #1 with a DoseRank score of 84. L-Citrulline has moderate human evidence for this outcome.
The form“Why L-Citrulline — not Panax Ginseng or Horny Goat Weed?”Evidence Moderate evidence
L-Citrulline has moderate human evidence for this outcome.
- L-CitrullineThe pick
Moderate evidence · 3 g
Non-essential amino acid and the most efficient precursor to arginine and nitric oxide; raises plasma arginine more than arginine itself, supporting exercise blood flow.
- Panax Ginseng
Strong evidence
Adaptogenic root used in traditional Chinese and Korean medicine; best known for supporting energy, cognitive performance, and immune modulation via ginsenoside saponins.
- Horny Goat Weed
Limited evidence
Epimedium-derived botanical containing icariin, a mild PDE5 inhibitor; common in men's formulas for libido and circulation support.
Questions
Frequently asked
Nutricost, L-Citrulline, Unflavored , 1.3 lb (600 g) ranks #1 for Erectile function with a DoseRank score of 84. The score blends clinical strength, evidence, dose fit, trust signals and value across 1,966 products scored for this outcome.
L-Citrulline has moderate human evidence for this outcome.
L-Citrulline at 3 g sits below the studied 1500-5000 mg window. DoseRank scores this product's dose fit at 77 out of 100.
Nutricost, L-Citrulline, Unflavored , 1.3 lb (600 g) works out at $0.13 per serving. $0.13 per serving — low price tier for this outcome. Nothing else in this ranking costs less per serving.
No. Retailer links may be affiliate links, but rankings and placement are never paid. Every product is scored by the same public model, and the ranking is recomputed from the underlying product data rather than edited by hand.
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