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Vitastrong L-ARGININE KyowaQuality® is an L-Arginine food supplement indicated in case of increased need for L-Arginine, in particular for athletes who practice intense physical activity.



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Arginine is an essential amino acid that plays a fundamental role in the synthesis of proteins, used by the body for the maintenance and growth of muscle mass.

Supplementing Arginine is essential in the case of restrictive diets or in the presence of periods of strong psychophysical stress and for this reason it may be useful to take the daily dose through the integration of VitaStrong L-Arginine KyowaQuality.

In the sports field, Arginine integration is important for its antioxidant functions, helping to improve sports performance especially in very intense sports (Free Radic Res. 2017 Mar;51(3):281-293). It also plays a primary role in detoxification (Indian J Biochem Biophys. 2009 Dec;46(6):498-502) by eliminating nitrogenous toxins that accumulate in the body and are more present in athletes (The Journal of nutrition, health and aging Volume 18, Issue 2, February 2014, Pages 213-218).


  • L-arginine has antioxidant and anti-inflammatory properties that help eliminate toxins and fight free radicals (Indian J Biochem Biophys. 2009 Dec;46(6):498-502),
  • L-arginine is able to eliminate ammonia which, in a persistent form, can break down proteins and create chronic inflammation (The Journal of nutrition, health and aging Volume 18, Issue 2, February 2014, Pages 213-218),
  • L-arginine has positive effects on cardiovascular health (Pharmacol Rep. 2005 Jan-Feb;57(1):14-22),
  • L-arginine supports the normal activity of the immune system (Surgery 1988 Aug;104(2):142-51.),
  • L-arginine improves sports performance (Nutrients. 2023 Jan 28;15(3):660),
  • L-arginine appears to act positively on blood pressure (Nutrients. 2019 Jul; 11(7): 1679).

DOSE AND HOW TO USE : Take 6 tablets a day with a glass of water.

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L-Arginine HCl (KyowaQuality®), bulking agents: cellulose, hydroxypropylcellulose; corn starch, anti-caking agents: fatty acids, magnesium salts of fatty acids, silicon dioxide; pyridoxine hydrochloride (vitamin B6).

Average values
for 6 tablets
% NRV*
4500 mg
Vitamin B6
0.6 mg
*VNR: daily reference nutritional value pursuant to EU Reg. n.1169/2011

WARNINGS AND INSTRUCTIONS FOR USE: for all warnings and instructions for use on the product, consult the label which can be downloaded from THIS LINK

Product packaging may contain different information than that shown on our site. Please always read the label, warnings and instructions provided on the product before using or consuming it.

This product is registered with the Ministry of Health in Italy, France, Spain, and Germany and does not contain any doping substances or substances harmful to health.

  • For our products, we select only the highest quality raw materials and rigorously control every phase of the production process to ensure maximum efficacy and safety.
  • For products in tablets, capsules, and jars, the packaging has 3 levels of security: an external plastic sleever, a tightly closed cap, and an induction seal welded between the cap and the jar.
  • For products in a pouch, the packaging is heat-sealed with a freshness-saving zip.
  • For products in a glass jar, there is a guarantee seal between the cap and the jar.