Educational buying math only — not medical advice, not live pricing, and not a product recommendation.

Back to L-citrulline vs L-arginine guide

Cost per additional responder

Formula

$/responder ≈ monthly $ × months × NNT

Locked presets

Cormio 2011 · citrulline · 1.5 g/day · Article example: $30 / 100 servings of 1.5 g ≈ $9/mo

$9/mo × 1 mo × NNT 3 ≈ $27 spent on treatment for each additional responder beyond control. Single-blind pilot, n=24; 95% CI not reported. Cost tier locked from the article’s $30/100 example — not a brand quote.

Example: Citrulline → $27 per additional responder

Educational only — not medical or financial advice. Disclaimer.

How to use this

  • Presets only — pick a locked trial + cost tier. There is no free price or free % input; that math is too easy to game.
  • Dichotomous presets — monthly cost × horizon months × NNT ≈ dollars spent on treatment for each additional responder beyond control.
  • Continuous presets — course cost ÷ measured effect (e.g. terminal hairs/cm²) ≈ dollars per outcome unit over the course.
  • Cost tiers are editorial locks — article examples or mid-range retail context, not live shelf prices for a specific SKU.

Evidence context

Absolute-risk framing (ARD / NNT) is how we translate dichotomous trial endpoints in the methodology. Cost-per-response stacks a locked retail tier on top of that so a buying decision can compare “cheap bottle” vs “cheap per additional benefit.” Continuous hair-density estimates use the same locked-tier idea with an effect divisor instead of NNT.

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