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Cheapest L-Arginine on iHerb

Ranked by real cost per 1,000 mg of L-Arginine — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 10.8× more per 1,000 mg of L-Arginine than the best-value pick Best Naturals. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 1,000 mg
1
Best Naturals, L-Arginine, 1 lb (454 g)
Best Naturals, L-Arginine, 1 lb (454 g)
Best Naturals
4,600 mg9816.160.036View on iHerb →
2
fitcode, L-Arginine, 100 Capsules (750 mg per Capsule)
fitcode, L-Arginine, 100 Capsules (750 mg per Capsule)
fitcode
1,500 mg504.810.064View on iHerb →
3
Nutricost, L-Arginine, 1,000 mg, 300 Tablets
Nutricost, L-Arginine, 1,000 mg, 300 Tablets
Nutricost
1,000 mg30025.950.087View on iHerb →
4
Nutricost, L-Arginine, 1,000 mg, 150 Tablets
Nutricost, L-Arginine, 1,000 mg, 150 Tablets
Nutricost
1,000 mg15015.950.106View on iHerb →
5
Best Naturals, L-Arginine, L-Citrulline Complex, 250 Tablets
Best Naturals, L-Arginine, L-Citrulline Complex, 250 Tablets
Best Naturals
750 mg25021.510.115View on iHerb →
6
Primaforce, L-Arginine, 300 Capsules (500 mg per Capsule)
Primaforce, L-Arginine, 300 Capsules (500 mg per Capsule)
Primaforce
1,000 mg15018.500.123View on iHerb →
7
Nutricost, L-Arginine, 500 mg, 300 Capsules
Nutricost, L-Arginine, 500 mg, 300 Capsules
Nutricost
500 mg30019.950.133View on iHerb →
8
EVLution Nutrition, Creatine + L-Arginine, Unflavored, 7.05 oz (200 g)
EVLution Nutrition, Creatine + L-Arginine, Unflavored, 7.05 oz (200 g)
EVLution Nutrition
2,500 mg4013.660.137View on iHerb →
9
Force Factor, L-Arginine, 150 Capsules
Force Factor, L-Arginine, 150 Capsules
Force Factor
3,000 mg3012.790.142View on iHerb →
10
Nutricost, L-Arginine + L-Citrulline, 240 Capsules
Nutricost, L-Arginine + L-Citrulline, 240 Capsules
Nutricost
500 mg24018.950.158View on iHerb →
11
Nature's Truth, Vitamins, Maximum Strength L-Arginine HCL, 1,000 mg, 50 Coated Caplets
Nature's Truth, Vitamins, Maximum Strength L-Arginine HCL, 1,000 mg, 50 Coated Caplets
Nature's Truth
1,000 mg509.260.185View on iHerb →
12
Nutricost, L-Arginine + L-Ornithine, 750 mg, 180 Capsules
Nutricost, L-Arginine + L-Ornithine, 750 mg, 180 Capsules
Nutricost
500 mg18016.950.188View on iHerb →
13
Nature's Truth, L-Arginine, 500 mg, 100 Quick Release Capsules
Nature's Truth, L-Arginine, 500 mg, 100 Quick Release Capsules
Nature's Truth
1,000 mg5010.090.202View on iHerb →
14
Nutricost, L-Arginine & L-Citrulline, 120 Capsules
Nutricost, L-Arginine & L-Citrulline, 120 Capsules
Nutricost
500 mg12012.950.216View on iHerb →
15
Natural Factors, L-Arginine, 500 mg, 90 Vegetarian Capsules
Natural Factors, L-Arginine, 500 mg, 90 Vegetarian Capsules
Natural Factors
1,000 mg459.770.217View on iHerb →
16
EVLution Nutrition, L-Arginine+l-Citrulline, Unflavored, 5.29 oz (150 g)
EVLution Nutrition, L-Arginine+l-Citrulline, Unflavored, 5.29 oz (150 g)
EVLution Nutrition
1,000 mg7516.510.220View on iHerb →
17
fitcode, Creatine Monohydrate + L-Arginine, 120 Veggie Capsules
fitcode, Creatine Monohydrate + L-Arginine, 120 Veggie Capsules
fitcode
500 mg606.990.233View on iHerb →
18
Futurebiotics, Beet Root + L-Arginine, 120 Vegetarian Capsules
Futurebiotics, Beet Root + L-Arginine, 120 Vegetarian Capsules
Futurebiotics
1,000 mg6014.990.250View on iHerb →
19
Carlson, L-Arginine, 180 Capsules (675 mg per Capsule)
Carlson, L-Arginine, 180 Capsules (675 mg per Capsule)
Carlson
1,350 mg9031.860.262View on iHerb →
20
Mason Natural, Vein Erect with L-Arginine & Maca, 80 Capsules
Mason Natural, Vein Erect with L-Arginine & Maca, 80 Capsules
Mason Natural
2,500 mg2013.270.265View on iHerb →
21
Nutrex Research, L-Arginine 1000, 120 Capsules (500 mg per Capsule)
Nutrex Research, L-Arginine 1000, 120 Capsules (500 mg per Capsule)
Nutrex Research
1,000 mg6016.340.272View on iHerb →
22
EVLution Nutrition, Creatine Plus L-Arginine, 120 Veggie Capsules
EVLution Nutrition, Creatine Plus L-Arginine, 120 Veggie Capsules
EVLution Nutrition
500 mg6010.310.344View on iHerb →
23
Source Naturals, Wellness, ImmuNitric® Powder, 8 oz (226.8 g)
Source Naturals, Wellness, ImmuNitric® Powder, 8 oz (226.8 g)
Source Naturals
2,400 mg3024.950.347View on iHerb →
24
Doctor's Best, L-Arginine, 120 Bilayer Tablets (500 mg per Tablet)
Doctor's Best, L-Arginine, 120 Bilayer Tablets (500 mg per Tablet)
Doctor's Best
1,000 mg6020.990.350View on iHerb →
25
Michael's Health, Arginine Citrulline, 45 Tablets
Michael's Health, Arginine Citrulline, 45 Tablets
Michael's Health
2,250 mg1513.130.389View on iHerb →

How we rank L-Arginine

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.