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PURE L-Arginine 300g

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PURE L-Arginine is 100% Pure Active L-Arginine - a Nitric Oxide booster. As a naturally occurring amino acid it helps to improve circulation, promote rapid recovery from exercise to enhance endurance and increase lean muscle strength, power & mass.

£29.99 RRP: £49.99

Accelerated Muscle Growth, Recovery & Endurance Is Achievable Through Ultra-Pure, Bioactive L-Arginine

PharmaMuscle uses innovative new scientific technology and the highest grade sources to produce the most pure, highly absorbable, bioactive L-Arginine supplement. Arginine is a semi-essential amino acid which means that under conditions of high protein turnover, like exercise, arginine becomes an essential amino acid that must be supplemented. As well as being an essential building block of proteins, arginine directly stimulates muscle growth, improves circulation and boosts immune defence.

  • 100% pure L-Arginine is highly bioavailable due to the innovative new refining technologies used to produce the purest arginine supplement to enable rapid & complete absorption
  • Naturally occurring amino acid that helps to improve circulation, promote rapid recovery from exercise to enhance endurance and increase lean muscle mass strength, power & mass
  • Potently stimulates the release of Growth Hormone (GH) to increase the rate of muscle growth to maximise gains from training and exercise
  • Arginine provides the essential nitrogen group that is a precursor to the formation of nitric oxide (NO) which acts as a potent vasodilator to increase blood flow to muscles
  • Potent vasodilator effects of L-Arginine provides additional health benefits including reducing the arterial resistance to blood flow to treat the symptoms of hypertension
  • L-Arginine protects against oxidative stress by scavenging harmful free radicals that are produced during high intensity exercise

The L-Arginine Difference – What Makes Our Formula Better Than Other Supplements?

Our advanced formulation method means that L-Arginine prides itself on three key qualities that we believe distinguish our product from competitors:

  • Purity – L-Arginine is presented in its purest form to ensure the active components have the highest possible efficacy.
  • Bioavailability – This premium product provides a highly absorbable source of arginine which can rapidly potentiate muscle growth and hormone release.
  • Quality – We guarantee that only the highest quality sources are used to formulate this supplement to ensure maximum efficacy of this premium quality product.

Powerfully Stimulates Muscle Growth

The nitrogen-containing side-chain in arginine is cleaved to produce Nitric Oxide (NO) which is a potent vasodilator. NO is termed the 'endothelium derived relaxation factor' which determines which parts of the body receive extra blood flow. NO acts specifically on the muscle surrounding arterioles that supply blood to major organs and skeletal muscle to cause them to relax. This relaxation reduces the resistance to blood flow which increases the rate of blood flow and therefore the nutrients and oxygen carries with it. Oxygen is often the limiting factor in muscle endurance and power which is greatly improved by increased delivery due to the vasodilatory effect of NO. Furthermore, higher blood flow removes lactic acid and other toxins from muscle tissue which can limit performance and increased supply of nutrients provides the raw materials for muscle growth at a faster rate.

Arginine has been shown by scientists to potentiate the release of growth hormone. In a study involving infusion of arginine or saline (as a control experiment) into healthy adults, it was found that relative to the control experiment, arginine triggered an increase in serum growth hormone levels. Further studies have outlined the biological mechanism of this action to show this occurs because arginine blocks the inhibitor of growth hormone, somatostatin. The graph shows the results of a study of the effect of arginine and exercise on serum GH levels. Relative to the normal levels of GH in the blood represented by the placebo, it is evident that arginine supplementation causes a significant increase in the concentration of GH in the blood. Furthermore, exercise and arginine supplementation together work synergistically to potentiate an even greater increase in serum GH levels.

The high purity of our L-Arginine supplement ensures that it is completely absorbed and rapidly reaches the site of action to increase growth hormone levels, stimulate muscle growth and accelerate recovery.

Enhances the Immune Response

High intensity physical activity creates an increase oxidative pressure in every cell as the rate of respiration increases. This increases the generation of free radicals which can cause irreversible damage to cells. L-Arginine has been shown to have antioxidant properties by scavenging these free radicals to neutralise the dangerous effects of oxidative stress induced by exercise. The reduced oxidative stress on the body functions to improve general health and in particular the bioactivity of T-lymphocytes are an important arm of the innate immune defence of the body.

L-Arginine has additionally been found to significantly impact the rate of tissue recovery. Whilst improved immunity and GH release due to L-Arginine helps to speed up repair of damaged tissue, L-Arginine acts via another mechanism to increase wound repair. Studies have found that arginine supplementation increases the deposition of collagen in damaged tissue which acts as a scaffold for new tissue growth to repair damage via a mechanism independent of anabolic hormones. Exciting new research is underway to delineate exactly how this happens.

Our ultra-pure, highly bioactive L-Arginine formula not only stimulates new muscle growth but accelerates muscle recovery to increase endurance & strength.

Vegetarian Society ApprovedSuper VitaminsMade in the UK by Experts


Active Ingredients: 100% Pure L-Arginine


The nutritional specialists that have been part of the formulation process have recommended that L-Arginine should be taken between 1 to 2 times per day as required and as directed by your personal trainer or healthcare professional.


  • This is a food supplement: This product should not be used as a substitute for a varied diet.
  • Always read all product packaging and labels prior to use
  • If you are taking any prescription medication, or you have a medical condition or specific concerns about the suitability of our products, always consult your GP or Pharmacist prior to taking these supplements.
  • Please do not exceed the recommended daily intake.
  • Store in a cool dry place and keep away from children at all times.
  • Do not use if the seal is broken.
  • Pregnant or lactating women should consult a Doctor before using this product.
  • Image is for illustration purposes only.
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Delivery Information

We know what a difference a speedy delivery makes and have a range of delivery options for you when you place your order.

Free Delivery When You Spend Over £50

We offer free standard delivery on orders over £50 in value to UK Mainland destinations.

Standard UK Delivery

Our Standard Delivery cost is £3.49.

Standard Delivery is available on orders on all mainland UK orders below 15kg. Deliveries will be made within 2-3 working days after you place your order [excluding Weekends] via Royal Mail. Please allow 7 full working days for your products to arrive.

If you are not around to accept your parcel, the carrier may leave it with a neighbour, or in a safe place (if they think it is safe to do so). A calling card will be left to let you know this has been done.

If the parcel can't be left in a safe place or with a neighbour, the carrier will take it back to the local depot, and leave you a card telling you how you can arrange redelivery.

Next Day Delivery (Mon - Fri)

Our Next Day Delivery (Mon - Fri) option is offered through DHL and only available for UK Mainland. It is priced at £5.95. The maximum weight per parcel is 30kg.

Channel Islands & Europe

Our delivery rates vary by destination and start from £4.95. The correct delivery charge will be displayed at checkout.

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International Orders

Our delivery rates dependent on the weight of your parcel and destination and start from £7.95. The correct delivery charge will be displayed at checkout.


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Brill for helping performance when playing active sports like football or rugby. Fast delivery, high quality product and effective...Result!

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