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Home › Amino acids & derivatives › L-Arginine

ThorneAmino acids & derivatives

L-Arginine, 120 capsules

£35.79 for 120 capsules at Healf. That works out at £1.79 per 3 g, which ranks it 10th of the 12 L-Arginine products we price across 7 UK retailers.

What it really costs, per 3 g£1.79One 3 g dose is our comparison unit for L-Arginine. It is not a recommendation.
A day£1.79
A week£12.53
A month£53.69
A year£653.17

At one 3 g dose a day, this pack lasts 20 days. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

  • Servings: 120 ÷ 2 per serving = 60
  • In the pack: 60 × 1 g = 60 g
  • £35.79 ÷ 60 g × 3 g = £1.79 per 3 g
  • A week £1.79 × 7 = £12.53 · a month × 30 = £53.69 · a year × 365 = £653.17
  • Amount per serving: stated on the label.

The standard dose is a comparison unit, not a recommendation. Always confirm the price on the retailer's site. How we compare everything.

Cheaper L-Arginine

All 12, ranked →
L-Arginine 1000mgLamberts Healthcare (Nature's Best) · 1 g a serving · £13.95 a month · a pack lasts 30 days47p£13.95View at Lamberts Healthcare (opens in a new tab)
L-ArginineHealf · 1 g a serving · £16.10 a month · a pack lasts 20 days54p£10.73View at Healf (opens in a new tab)
L-Arginine Capsules 500mgSimply Supplements · 500 mg a serving · £17.99 a month · a pack lasts 40 days60p£23.99View at Simply Supplements (opens in a new tab)
LambertsL-Arginine HCl 1000mgVitamin Planet · 1 g a serving · £23.11 a month · a pack lasts 30 days77p£23.11View at Vitamin Planet (opens in a new tab)
L-ArginineHealf · 1.4 g a serving · £39.50 a month · a pack lasts 21 days£1.32£27.65View at Healf (opens in a new tab)
This productHealf · 1 g a serving · £53.69 a month · a pack lasts 20 days£1.79shown above

Switching to the Lamberts Healthcare (Nature's Best) pack saves £39.74 a month at the same 3 g dose.

Ranked purely by price per 3 g. 15 combination products also contain L-Arginine.

On the label

L-Arginine · L-Arginine
1 g per serving (stated on the label)
Pack
120 capsules · 60 servings · 2 capsule(s) a serving
Cost per serving
60p (60 servings in the pack)
More label details
Sold by
Healf
What the listing says
“120 caps” · “Servings Per Container: 60” · “Serving Size: 2 Capsules” · “L-Arginine^ ; 1 g”
Ingredients

L-Arginine, L-Leucine, High And Low Viscosity Hydroxypropyl Methylcellulose, Calcium Laurate & Magnesium Citrate ((Time-Sorb®), Hypromellose (Derived from Cellulose) Capsule, Anti-Caking Agent (Silicon Dioxide)

From the Healf listing. Check the pack itself if you have an allergy: labels mark allergens in bold.

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One 3 g dose is our comparison unit, not a recommendation.

Price history

No price change since 1 October 2026. Checked on 20 days, most recently 20 October 2026.

Price at every check
£35.79Healf
First recorded
£35.791 Oct
Checked on
20 dayssince 1 Oct
Pack price at each check.
  1. First checked at Healf: £35.79

Questions about this product

How much does Thorne L-Arginine cost per 3 g?

£1.79 per 3 g, from £35.79 for 120 capsules at Healf, checked on 20 October 2026.

Is it the cheapest L-Arginine in the UK?

No, it is 10th of 12. L Arginine at Bulk works out at 8p per 3 g.

How long does one pack last?

20 days at one 3 g dose. The pack holds 60 g in total.

About Thorne

All 123 Thorne products, priced per dose

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