We earn commission on purchases made through our links. It never affects ranking: tables are ordered purely by price per dose, and no retailer or brand can pay for position.We earn commission when you buy through our links. It never affects the ranking. Full disclosure.

perdose
Updated

Home › Amino acids & derivatives › L-Arginine

Bio-SynergyAmino acids & derivatives

Arginine, 125 capsules

£16.99 for 125 capsules at Bio-Synergy. That works out at 41p per 3 g, which ranks it 4th of the 12 L-Arginine products we price across 7 UK retailers.

What it really costs, per 3 g41pOne 3 g dose is our comparison unit for L-Arginine. It is not a recommendation.
A day41p
A week£2.85
A month£12.23
A year£148.83

At one 3 g dose a day, this pack lasts 42 days. A month is 30 days, so twelve of them is not quite a year.

How we worked it out

  • Servings: 125 ÷ 1 per serving = 125
  • In the pack: 125 × 1 g = 125 g
  • £16.99 ÷ 125 g × 3 g = 40.8p per 3 g
  • A week 40.8p × 7 = £2.85 · a month × 30 = £12.23 · a year × 365 = £148.83
  • 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 ArginineCheapest per 3 gBulk · 3 g a serving · £2.45 a month · a pack lasts 11 months8p£27.19View at Bulk (opens in a new tab)
L ArginineBulk · 3 g a serving · £4.86 a month · a pack lasts 5 months16p£26.99View at Bulk (opens in a new tab)
L-ArginineHealf · 1 g a serving · £11.30 a month · a pack lasts 40 days38p£15.06View at Healf (opens in a new tab)
This productBio-Synergy · 1 g a serving · £12.23 a month · a pack lasts 42 days41pshown above

Switching to the Bulk pack saves £9.79 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
125 capsules · 125 servings · 1 capsule(s) a serving
Cost per serving
14p (125 servings in the pack)
More label details
Barcode
5034839001216
Sold by
Bio-Synergy
What the listing says
“Specifications: 125 caps” · “With 1000mg L-arginine in each capsule”
Is something wrong? Tell us

Add to your basket

View basket

Your basket prices everything you take together: whole packs, delivery included, from as few websites as you like.

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

Price history

No price change since 21 September 2026. Checked on 29 days, most recently 20 October 2026.

Price at every check
£16.99Bio-Synergy
First recorded
£16.9921 Sept
Checked on
29 dayssince 21 Sept
Pack price at each check.
  1. First checked at Bio-Synergy: £16.99

Questions about this product

How much does Bio-Synergy Arginine cost per 3 g?

41p per 3 g, from £16.99 for 125 capsules at Bio-Synergy, checked on 20 October 2026.

Is it the cheapest L-Arginine in the UK?

No, it is 4th of 12. L Arginine at Bulk works out at 8p per 3 g.

How long does one pack last?

42 days at one 3 g dose. The pack holds 125 g in total.

About Bio-Synergy

Founded 1997 · London, England

Bio-Synergy is a sports nutrition company founded in 1997 by Daniel Herman, who remains a director. It is based on Finchley Road in London and says its products are made in the UK.

All 29 Bio-Synergy products, priced per doseVisit Bio-Synergy (opens in a new tab)

More from Bio-Synergy

Keep comparing

All L-ArginineEvery form, cheapest per 3 g firstL-Arginine guideWhat it is, why people take it, how the forms differBio-SynergyAll 29 products from this brand, per doseAmino acids & derivativesEverything else we price in this categoryL-Arginine price historyEvery L-Arginine product's price per dose and price historyBuild a basketThe cheapest way to buy several at onceHow we compareWhere every number on this page comes from