Best L-Citrulline
The best l-citrulline we track, ranked by real cost-per-dose — not paid placements. Across 3 brands, none carry a certification we could verify in a public registry.
Updated October 2026prices checked what’s changed
How much does L-Citrulline cost?
L-Citrulline costs a median $0.14 per serving — the cheapest of the 8 we can price per dose is $0.10 per serving. Prices checked October 2026.
Ranked across 8 products · prices checked Oct 10, 2026
How we rank
We rank by cost-per-dose — price ÷ servings, normalized to the daily dose — so bottle sizes and strengths compare fairly. Prices are scraped at publication and re-checked when the catalog refreshes (see the “Prices checked” stamp above). There is no paid placement and no kickback for ordering. Full methodology · Editorial standards.
When cheapest ≠ best value
Our cheapest l-citrulline per dose is an oxide form — cheap and concentrated, but a low-absorption form, so your body takes up relatively little of it. Chelated forms (e.g. glycinate, citrate) are absorbed far better, so compare cost per absorbed unit, not sticker price alone. A bigger bottle isn’t automatically cheaper per dose either — this list already ranks by cost per dose, so a larger count only wins if it truly costs less per serving. Compare L-Citrulline forms.
Our data on this: how much the big bottle saves per serving · the gummy tax · the form premium · the price spread.
Full ranking by cost per dose
Cost-per-serving normalizes price across bottle sizes — a 60-count and a 365-count compare fairly.
- See offer#1Best valueL Citrulline Capsules - 99% Tested Purity - 1,200mg Per…
capsule · 1200mg · 210 servings · $19.95
$0.10per serving - See offer$0.10per serving
- See offer$0.11per serving1.1× #1
- See offer$0.13per serving1.4× #1
- See offer$0.14per serving1.5× #1
- See offer$0.18per serving1.9× #1
- See offer$0.18per serving1.9× #1
- See offer$0.33per serving3.5× #1
| # | Product | Form · dose | Tested | Servings | Price | $ / serving | Buy |
|---|---|---|---|---|---|---|---|
| 1 | L Citrulline Capsules - 99% Tested Purity - 1,200mg Per…Best value | capsule · 1200mg | 210 | $19.95 | $0.10 | See offer | |
| 2 | Nutricost L-Citrulline 1500mg | capsule · 1500mg | 180 | $17.95 | $0.10 | See offer | |
| 3 | Nutricost L-Citrulline 500mg | capsule · 500mg | 120 | $12.95 | $0.11 1.1× #1 | See offer | |
| 4 | NOW Foods Supplements, L-Citrulline 750 mg, Supports… | capsule · 750mg | 240 | $32.15 | $0.13 1.4× #1 | See offer | |
| 5 | NOW Foods Supplements, L-Citrulline 750 mg, Supports… | capsule · 750mg | 180 | $25.98 | $0.14 1.5× #1 | See offer | |
| 6 | NOW Foods Supplements, L-Citrulline 750 mg, Supports… | capsule · 750mg | 90 | $16.24 | $0.18 1.9× #1 | See offer | |
| 7 | NOW Foods Sports Nutrition | tablet · 1200mg | 120 | $21.90 | $0.18 1.9× #1 | See offer | |
| 8 | Nutricost L-Citrulline 2500mg Per Serving | tablet · 2500mg | 60 | $19.95 | $0.33 3.5× #1 | See offer |
See also: L-Citrulline basics · all best-value rankings
Read: L-Citrulline guides
Related comparisons, stacks & nutrients
L-Citrulline brands we compare — which are third-party tested?
None of the 3 brands ranked above appear in the USP, NSF or Informed-Sport public registries. We don't count a "lab tested" claim printed on a label as third-party testing.
Frequently asked
How much does L-Citrulline cost?+
The cheapest l-citrulline we track is $0.10 per serving ($19.95 for 210 servings), against a typical $0.14 per serving across the 8 we can price per dose — about $2.85 a month at the cheapest. That's real cost per dose from live Amazon US prices as of October 2026, not the sticker price.
What is the best-value L-Citrulline supplement?+
L Citrulline Capsules - 99% Tested Purity - 1,200mg Per Serving… — $0.10 per serving ($19.95 for 210 servings), the lowest cost-per-dose l-citrulline in our Amazon US catalog as of October 2026.
How much does L-Citrulline cost per day?+
The cheapest l-citrulline we track works out to $0.10 per serving, against a typical $0.14 per serving across the 8 we can price per dose. Retailers and review sites list a price and a serving size but rarely divide it out — this is what a day actually costs, as of October 2026.
What is the typical cost per dose for L-Citrulline?+
About $0.14 per serving across the 8 l-citrulline products we can price per dose (combination products are left out — their single label dose belongs to whichever ingredient the product is built around) — the cheapest we track is $0.10 per serving, with most falling between $0.11 and $0.18.
What is the highest-quality L-Citrulline supplement?+
None of the 3 l-citrulline brands ranked here carry a USP, NSF or Informed-Sport certification we could confirm in the public registries as of October 2026. That does not make them bad — most supplement brands never submit to voluntary testing — but if independent verification matters to you, check the registries linked below before buying.
Which L-Citrulline brands are third-party tested?+
None of the 3 brands on this page appear in the USP, NSF or Informed-Sport public registries. We never count a "lab tested" claim printed on a label as third-party testing — only an entry in the certifier's own registry.
Which L-Citrulline is the top rated?+
We don't republish marketplace star ratings — they belong to the retailer, they move constantly, and a 4.6 average tells you nothing about what is in the capsule. The two things you can verify are what a dose costs and whether an independent lab checked the label. On this page the best value is L Citrulline Capsules - 99% Tested Purity - 1,200mg Per… at $0.10 per serving; no brand here holds a certification we could verify in a public registry.
What dose of L-Citrulline do these supplements come in?+
The l-citrulline products we track range from 500mg to 2500mg per serving. We rank by cost per serving so you can compare value across strengths — check the label for the dose that suits you.
Independent testing
Independent third-party testing is a voluntary check of a product's identity, potency and contaminants by an outside lab. It's a quality signal, not a value or efficacy claim. Confirm any brand's current status on the official registries:
Testing status is self-reported by the brand or drawn from public certification and may change — always verify on the official registry before purchase.
References & sources
We link primary sources and paraphrase their findings — never copy their text, tables, or images. Cost-per-dose figures are our own first-party catalog data.