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Monograph: Arginine, L-

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This monograph is intended to serve as a guide to industry for the preparation of Product Licence Applications (PLA) and labels for natural health product market authorization. It is not intended to be a comprehensive review of the medicinal ingredient. It is a referenced document to be used as a labelling standard. Text in parentheses is additional optional information which can be included on the PLA and product label at the applicant's discretion. The solidus (/) indicates that the terms and/or statements are synonymous. Either term or statement may be selected by the applicant.

Date: 2018-08-27


L-Arginine (ChemIDplus Advanced)

Proper Name(s)

Common Name(s)

L-Arginine ( NIH 2018 , O'Neil et al. 2018 )

Source Material

Reference: NIH 2018, BP 2009, USP 32 2009, Ph. Eur. 2007

Route Of Administration


Dosage Form(s)

  • Acceptable dosage forms for the age category listed in this monograph and specified route of administration are indicated in the Compendium of Monographs Guidance Document.
  • This monograph excludes foods or food-like dosage forms as indicated in the Compendium of Monographs Guidance Document.

Use(s) or Purpose(s)

Statement(s) to the effect of:



Dose(s): 1 Day per day

Duration of use

Risk Information

Statement(s) to the effect of:

Caution(s) and Warning(s):

Doses greater than or equal to 0.42 Grams per day:
Do not use this product if you have had a heart attack/myocardial infarction.  (Shulman et al. 2006)

Known Adverse Reaction(s):
Doses greater than or equal to 0.42 Grams per day:
Some people may experience gastrointestinal discomfort (such as diarrhea).  (Grimble 2007, IOM 2005, Evans et al. 2004, Clarkson et al. 1996)

Non-medicinal ingredients

Must be chosen from the current Natural Health Products Ingredients Database and must meet the limitations outlined in the database.

Storage Conditions

No statement required.


  • The finished product specifications must be established in accordance with the requirements described in the NHPD Quality of Natural Health Products Guide.
  • The medicinal ingredient must comply with the requirements outlined in the Natural Health Products Ingredient Database (NHPID).
  • The finished product specifications must be established in accordance with the requirements described in the Natural and Non-prescription Health Products Directorate (NNHPD) Quality of Natural Health Products Guide.The medicinal ingredient may comply with the specifications outlined in NHPID.

References cited

  • Adams MR, Forsyth CJ, Jessup W, Robinson J, Celermajer DS. 1995. Oral L-arginine inhibits platelet aggregation but does not enhance endothelium-dependent dilation n healthy young men. Journal of the American College of Cardiology 26(4): 1054-1061
  • Adams MR, McCredie R, Jessup W, Robinson J, Sullivan D, Celermajer DS. 1997. Oral L-Arginine improves endothelium-dependent dilatation and reduces monocyte adhesion to the endothelial cells in young men with coronary artery disease. Atherosclerosis 129: 261-269.
  • Alexander JW, Metze TJ, McIntosh MJ, Goodman HR, First MR, Munda R, Cardi MA, Austin JN, Goel S, Safdar S, Greenberg N, Chen X, Woodle ES. 2005. The influence of immunomodulatory diets on transplant success and complications. Transplantation 79:460-465.
  • Bednarz B, Wolk R, Chamiec T, Herbaczyriska-Cedro K, Winek D, Ceremu?y?ski L. 2000. Effects of oral L-arginine supplementation on exercise-induced QT dispersion and exercise tolerance in stable angina pectoris. International Journal of Cardiology 75(2-3):205-210.
  • Bode-Böger SM, Muke J, Surdacki A, Brobant G, Böger RH, Frölich J. 2003. Oral L-arginine improves endothelial function in healthy individuals older than 70 years. Vascular Medicine 8(2):77-81.
  • BP 2008: British Pharmacopoeia Commission. 2008. British Pharmacopoeia 2009, Volume II. London (GB): The Stationary Office on behalf of the Medicines and Healthcare products Regulatory Agency (MHRA).
  • Ceremu?y?ski L, Chamiec T, Herbaczy?ska-Cedro K. 1997. Effect of supplemental oral L-arginine on exercise capacity in patients with stable angina pectoris. The American Journal of Cardiology 80(3):331-333.
  • Clarkson P, Adams MR, Powe AJ, Donald AE, McCredie R, Robinson J, McCarthy SN, Keech A, Celermajer DS, Deanfield JE. 1996. Oral L-arginine endothelium-dependent dilation in hypercholesterolemic young adults. Journal of Clinical Investigation 97(8):1989-1994.
  • De Nicola L, Bellizzi V, Minutolo R, Andreucci M, Capuano A, Garibotto G, Corso G, Andreucci VE, Cianciaruso B. 1999. Randomized, double-blind, placebo-controlled study of arginine supplementation in chronic renal failure. Kidney International 56:674-684.
  • Doutreleau S, Mettauer B, Piquard F, Rouyer O, Schaefer A, Lonsdorfer J., Beny B. 2006. Chronic L-Arginine Supplementation Enhances Endurance Exercise Tolerance in Heart Failure Patients. International Journal of Sports Medicine 27(7):567-572.
  • Doutreleau S, Rouyer O, Di Marco P, Lonsdorfer E, Richard R, Piquard F, Geny B. 2010. L-Arginine supplementation improves exercise capacity after a heart transplant. American Journal of Clinical Nutrition. Doi: 10.3945/ajcn.2009.27881.
  • European Pharmacopoeia, 6th edition. Strasbourg (France): Directorate for the Quality of Medicines and HealthCare of the Council of Europe (EDQM).; 2008
  • Evans WR, Fernstrom JD, Thompson J, Morris SM Jr, Kuller LH. 2004. Biochemical responses of healthy subjects during dietary supplementation with L-arginine. Journal of Nutritional Biochemistry 15(9):534-539.
  • Grimble GK. 2007. Adverse gastrointestinal effects of arginine and related amino acids. The Journal of Nutrition 137(6 Suppl 2):1693S-1701S.
  • Groff J, Gropper S. Advanced Nutrition and Human Metabolism, 3rd edition. Belmont (CA): Wadsworth/Thomson Learning; 2000.
  • Hambrecht R, Hilbrich L, Erbs S, Gielen S, Fiehn E, Schoene N, Schuler. 2000. Correction of endothelial dysfunction in chronic heart failure: additional effects of exercise training and oral L-arginine supplementation. Journal of the American College of Cardiology 35(3):706-713.
  • Huynh NT, Tayek JA. 2002. Oral arginine reduces systemic blood pressure in type 2 diabetes: Its potential role in nitric oxide generation. American College of Nutrition 21(5):422-427.
  • IOM 2005: Institute of Medicine. Panel on Dietary Reference Intakes for Electrolytes and Water, and the Standing Committee on the Scientific Evaluation of Dietary Reference Intakes, Food and Nutrition Board, Institute of Medicine. 2005. Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate. Washington (DC): National Academies Press.
  • IOM 2006: Institute of Medicine. Otten JJ, Pitzi Hellwig J, Meyers LD, editors. Institute of Medicine. Dietary Reference Intakes: The Essential Guide to Nutrient Requirements. Washington (DC): National Academies Press; 2006.
  • Lekakis JP, Papathanassiou S, Papaioannou TG, Papamichael CM, Zakopoulos N, Kotsis V, Dagre AG, Stamatelopoulos K, Protogerou A, Stamatelopoulos SF. 2002. Oral L-arginine improves endothelial dysfunction in patients with essential hypertension. International Journal of Cardiology 86(2-3):317-323.
  • Lerman A, Burnett JC, Higano ST, McKinley LJ, Holmes Jr DR. 1998. Long-term L-arginine supplementation improves small-vessel coronary endothelial function in humans. Circulation 97(21):2123-2128.
  • Lim SD, Mooradian SJ, Goldberg CS, Gomez C, Crowley DC, Rocchini AP, Charpie JR. 2004. Effect of oral L-arginine on oxidant stress, endothelial dysfunction, and systemic arterial pressure in young cardiac transplant recipients. The American Journal of Cardiology 94(6):828-831.
  • Nagaya N, Uematsu M, Oya H, Sato N, Sakamaki F, Kyotani S, Ueno K, Nakanishi N, Yamagishi M, Miyatake K. 2001. Short-term oral administration of L-arginine improves hemodynamics and exercise capacity in patients with precapillary pulmonary hypertension. American Journal of Respiratory and Critical Care Medicine 163(4):887-891.
  • NIH 2018: National Institutes of Health. ChemIDplus advanced. Bethesda (MD): Specialized Information Services, National Library of Medicine, National Institutes of Health, US Department of Health & Human Services. [Accessed 2018 June 15]. Available from:
  • O'Neil MJ, Heckelman PE, Koch CB, Roman KJ, editors. 2018. The Merck Index: An Encyclopedia of Chemicals, Drugs, and Biologicals [online]. Whitehouse Station (NJ): Merck & Co., Inc. Electronic version [Accessed 2018 June 15]. Available from:
  • Palloshi A, Fragasso G, Piatti P, Monti LD, Setola E, Valsecchi G, Galluccio E, Chierchia SL, Morgonato A. 2004. Effect of oral L-arginine on blood pressure and symptoms and endothelial function in patients with systemic hypertension, positive exercise tests, and normal coronary arteries. The American Journal of Cardiology 93(7):933-935.
  • Parker JO, Parker JD, Caldwell RW, Farrell B, Kaesemeyer WH. 2002. The effect of supplemental L-arginine on tolerance development during continuous transdermal nitroglycerin therapy. Journal of the American College of Cardiology 39(7):1199-1203
  • Rector TS, Bank AJ, Mullen KA, Tschumperlin LK, Sih R, Pillai K, Kubo SH. 1996. Randomized, double-blind, placebo-controlled study of supplemental oral -arginine in patients with heart failure. Circulation 93(12):2135-2141.
  • Shao A, Hathcock JN. Risk assessment for the amino acids taurine, L-glutamine and L-arginine. Regul Toxicol Pharmacol. 2008 Apr;50(3):376-99. Epub 2008 Jan 26
  • Shils ME, Olson JA, Shike M, Ross AC, Caballero B, Cousins RJ, editors. Modern Nutrition in Health and Disease, 10th edition. Philadelphia (PA): Lippincott Williams & Wilkins; 2006.
  • Siani A, Pagano E, Iacone R, Iacoviello L, Scopacasa F, Strazzullo P. 2000. Blood pressure and metabolic changes during dietary L-arginine supplementation in humans. American Journal of Hypertension 13(5):547-551
  • Sydow K, Schwedhelm E, Arakawa N, Bode-Böger SM, Tsikas D, Hornig B, Frölich, Böger RH. 2002. ADMA and oxidative stress are responsible for endothelial dysfunction in hyperhomocyst(e)inemia: effects of L-arginine and B vitamins. Cardiovascular Research 57:244-252.
  • Tangphao O, Chalon S, Moreno HJr, Hoffman BB, Blaschke TF. 1999. Pharmacokinetics of L-arginine during chronic administration to patients with hypercholesterolaemia. Clinical Science 96:199-207.
  • USP 32 : United States Pharmacopeial Convention. 2009. United States Pharmacopeia and the National Formulary (USP 32 - NF 27). Rockville (MD): The United States Pharmacopeial Convention.

References reviewed

  • Abel T, Knechtle B, Perret C, Eser P, von Arx P, Knecht H. 2007. Influence of chronic supplementation of arginine aspartate in endurance athletes on performance and substrate metabolism: A randomized, double-blind, placebo-controlled study. International Journal of Sports Medicine 26(5):344-349
  • Andrés A, Morales JM, Prega M, Campo C, Lahera V, García-Robles R, Rodicio JL, Ruilope LM. 1997. L-arginine reverses the antinatriuretic effect of cyclosporine in renal transplant patients. Nephrology Dialysis Transplantation 12:1437-1440.
  • Becker Y, Olshevsky U, Levitt J. 1967. The role of arginine in the replication of Herpes simplex virus. The Journal of General Virology 1:471-478.
  • Bednarz B, Jaxa-Chamiec T, G?balska J, Herbaczy?ska-Cedro K, Ceremu?y?ski L. 2004. L-Arginine supplementation prolongs duration of exercise in congestive heart failure. Kardiologia Polska 60(4):348-353.
  • Bednarz B, Jaxa-Chamiec T, Maciejewski P, Szpajer M, Janik K, Gniot J, Kawka-Urbanek T, Drozdowska D, Gessek J, Laskowski H. 2005. Efficacy and safety of oral L-arginine in acute myocardial infarction. Results of multicenter, randomised, double-blind, placebo-controlled ARAMI pilot trial. Kardiologia Polska 62(5):421-426.
  • Blum A, Cannon III RO, Costello R, Schenke WH, Csako G. 2000. Endocrine and lipid effects of oral L-arginine treatment in healthy postmenopausal women. The Journal of Laboratory and Clinical Medicine 135(3):231-237.
  • Blum A, Porat R, Rosenchein Uri, Keren G, Roth A, Laniado S, Miller H. 1999. Clinical and inflammatory effects of dietary L-arginine in patients with intractable angina pectoris. American Journal of Cardiology 83(10):1488-1490.
  • Cannon RA III. 2002. Oral L-arginine (and other active ingredients) for ischemic heart disease?*. Journal of the American College of Cardiology 39(1):46-48.
  • Carrier M, Pellerin M, Pagé PL, Searle NR, Martineau R, Caron C, Solymoss C, Pelletier LC. 1998. Can L-arginine improve myocardial protection during cardioplegic arrest? Results of phase I pilot study. The Annals of Thoracic Surgery 66(1):108-112.
  • Carrier M, Pellerin M, Perrault LP, Bouchard D, Pagé P, Searle N, Lavoie J. 2002. Cardioplegic arrest with L-arginine improves myocardial protection: results of a prospective randomized clinical trial. The Annals of Thoracic Surgery 73(3):837-842.
  • Cartledge JJ, Davies AM, Eardley I. 2000. A randomized double-blind placebo-controlled crossover trial of the efficacy of L-arginine in the treatment of interstitial cystitis. BJU International 85:421-426.
  • Chen J, Wollman Y, Chernichovsky T, Iaina A, Sofer M, Matzkin H. 1999. Effect of oral administration of high-dose nitric oxide doner L-arginine in men with organic erectile dysfunction: results of a double-blind, randomized, placebo-controlled study. BJU International 83:269-273
  • Coman D, Yaplito-Lee J, Boneh A. 2008. New indications and controversies in arginine therapy. 27(4): 489-496
  • Dangas G, Kuepper F. 2002. Restenosis: Repeat narrowing of a coronary artery. Circulation 105:2586-2587.
  • Dinh H, Nathan L. 2002. Medroxyprogesterone acetate does not antagonize estrogen-induced increases in endothelium-dependent vasodilation: potential clinical implications. American Society for Reproductive Medicine 78(1):122-127
  • Facchinetti F, Saade GR, Neri I, Pizzi C, Longo M, Volpe A. 2007. L-Arginine supplementation in patients with gestational hypertension: a pilot study. Hypertension in Pregnancy 26:121-130.
  • Fahs CA, Heffernan KS, Fernhall B. 2009. Hemodynamic and vascular response to resistance exercise with L-arginine. Medicine and Science in Sports and Exercise 41(4):773-779.
  • Faldetta MC, Laurenti O, Desideri G, Bravi MC, De Luca O, Marinucci MC, De Mattai G, Ferri C. L-Arginine infusion decreases plasma total homocysteine concentrations through increased nitric oxide production and decreased oxidative status in type II diabetic patients. Diabetologia 45:1120-1127.
  • Fricke O, Baecker N, Heer M, Tutlewski B, Schoenau E. 2008. The effect of L-arginine administration on muscle force and power in postmenopausal women. Clinical Physiology and Functional Imaging 28(5):307-311.
  • Garhöfer G, Resh H, Lung S, Weigert G, Schmetterer L. 2005. Intravenous administration of L-arginine increases retinal and choroidal blood flow. American Journal of Ophthalmology 140:69-76.
  • Gornik HL, Creaher MA. 2004. Arginine and endothelial and vascular health. Journal of Nutrition 134:2880S-2887S.
  • Griffith RS, DeLong DC, Nelson JD. 1981. Relation of arginine-lysine antagonism to herpes simplex growth in tissue culture. Chemotherapy 27(3):209-213.
  • Inglis VBM. 1968. Requirement of arginine for the replication of herpes virus. The Journal of General Virology 3:9-17.
  • Jahangir E, Handy D, Palmisano J, Loscalzo J. 2009. The effect of L-arginine and creatine on vascular function and homocysteine metabolism. Vascular Medicine 14(3): 239-248
  • Kiziltepe U, Tunçtan B, Eyileten ZB, Sirlak M, Arikbuku M, Tasoz R, Uysalel A, Ozyurda U. 2004. Efficiency of L-arginine enriched cardioplegia and non-cardioplegic reperfusion in ischemic hearts. International Journal of Cardiology 97:93-100.
  • Klotz T, Mathers MJ, Braun M, Bloch W, Engelmann U. 1999. Effectiveness of Oral L-Arginine in First-Line Treatment of Erectile Dysfunction in a Controlled Crossover Study.
  • Lauer T, Kleinbongart P, Rath J, Schultz R, Kelm M, Rassaf T. 2008. L-Arginine preferentially dilates stenotic segments of coronary arteries thereby increasing coronary flow. Journal of Internal Medicine 264:237-244.
  • Lebret T, Hervé JM, Gorny P, Worcel M, Botto H. 2002. Efficacy and safety of a novel combination of L-arginine glutamate and yohimbine hydrochloride: a new oral therapy for erectile dysfunction. European Urology 41:608-613
  • Lee J, Ryu H, Farrante RJ, Morris SM Jr, Ratan RR. 2003. Translational control of inducible nitric oxide synthase expression by arginine can explain the arginine paradox. Neuroscience 100(8): 4843-4848.
  • Loscalzo J. 2000. What we know and don't know about L-arginine and NO. Circulastion 101:2126-2129.
  • Loscalzo J. 2003. Adverse effects of supplemental L-arginine in atherosclerosis: Consequences of methylation stress in a complex catabolism? Arteriosclerosis & thrombosis and Vascular Biology 23:3-5.
  • Loď C, Zazzo JF, Delpierre E, Niddam C, Neveux N, Curis E, Arnaud-Bettandier F, Cynober L. 2009. Increasing plasma glutamine in postoperative patients fed an arginine-rich immune-enhancing diet-A pharmacokinetic randomized controlled study. Critical Care Medicine 37(2):501-509.
  • Lucotti P, Setola E, Monti LD, Galluccio E, Costa S, Sandoli EP, Fermo I, Rabaiotti G, Gatti R, Piatti PM. 2006. Beneficial effects of long-term oral L-arginine treatment added to a hypocaloric diet and exercise training program in obese, insulin-resistant type 2 diabetic patients. American Journal of Physiology. Endocrinology and Metabolism 291:906-912.
  • Marchesi S, Lupattelli G, Siepi D, Roscini AR, Vaudo G, Sinzinger H, Monnarino E. 2001. Oral L-arginine administration attenuates postprandial endothelial dysfunction in young healthy males. Journal of Clinical Pharmacy and Therapeutics 26:343-349.
  • Mariotti F, Huneau JF, Szczepanski I, Petzke KJ, Aggoun Y, Tomé D, Bonnet D. 2007. Meal amino acids with varied levels of arginine do not affect postprandial vascular endothelial function in healthy young men. The Journal of Nutrition 137:1383-1389.
  • Martina V, Masha A, Gigliardi RV, Brocato L, Manzato E, Berchio A, Massarenti P, Settanni F, Casa LD, Bergamini S, Iannone A. 2008. Long-term N-acetylcysteine and L-arginine administration reduces endothelial activation and systolic blood pressure in hypertensive patients with type 2 diabetes. Diabetes Care 31(5):940-944.
  • Maxwell AJ, Zapien MP, Pearce GL, MacCallum G, Stone PH. 2002. Randomized trial of a medical food for the dietary management of chronic stable angina. Journal of American College of Cardiology 39(1): 37-45.
  • Mikami T, Onuma M, Hayashi TTA. 1974. Requirement of arginine for the replication of Marek's Disease herpes virus. The Journal of General Virology 22:115-128
  • Morris CR, Kuypers FA, Larkin S, Sweeters N, Simon J, Vichinsky EP, Styles LA. 2000. Arginine therapy: a novel strategy to induce nitric oxide production in sickle cell disease. British Journal of Haematology 111:498-500
  • Morris CR, Morris SM, Hagar W, van Warmerdam J, Claster SKepka-Lenhart D, Machado L, Kuypers FA, Vichinsky EP. 2003. Arginine therapy: a new treatment for pulmonary hypertension in sickle cell disease?. American Journal of Respiratory and Critical Care Medicine 168(1):63-69.
  • Naito T, Irei H, Tsujimoto K, Ikeda K, Arakawa T, Koyama AH. 2009. Antiviral effect of arginine against herpes simplex virus type 1. International Journal of Molecular Medicine 23: 495-499.
  • Napoli C, Farzati B, Sica V, Iannuzzi E, Coppola G, Silvestroni A, Balestrieri ML, Florio A, Matarazzo A. 2008. Beneficial effects of autologous bone marrow cell infusion and antioxidants/L-arginine in patients with chronic critical limb ischemia. European Journal of Cardiovascular Prevention and Rehabilitation 215:709-718.
  • Oka RK, Szuba A, Giacomini JC, Cooke JP. 2005. A pilot study of L-arginine supplementation on functional capacity in peripheral arterial disease. Vascular Medicine 10:265-274.
  • Oomen CM, van Erk J, Feskens EJM, Kok FJ, Kromhout D. 2007. Arginine intake and risk of coronary heart disease mortality in elderly men. Arteriosclerosis, Thrombosis and Vascular Biology 20:2134-2139.
  • Palloshi A, Fragasso G, Piatti P, Monti LD, Setola E, Valsecchi G, Galluccio E, Chierchia SL, Morgonato A. 2004. Effect of oral L-arginine on blood pressure and symptoms and endothelial function in patients with systemic hypertension, positive exercise tests, and normal coronary arteries. The American Journal of Cardiology 93(7):933-935.
  • Parnell MM, Holst DP, Kaye DM. 2005. Augumentation of endothelial function following exercise training is associated with increased L-arginine transport in human heart failure. Clinical Science 109:523-530.
  • Peters N, Freilinger T, Opherk C, Pfefferkorn T, Dichgans M. 2008. Enhanced L-arginine-induced vasoreactivity suggests endothelial dysfunction in CADASIL. Journal of Neurology 255:1203-1208.
  • Polan ML, Hochberg RB, Trant AS, Wuh HCK. 2004. Estrogen bioassay of ginseng extract and Arginmax, a nutritional supplement for the enhancement of female sexual function. Journal of Women's Health 13(4): 427-430
  • Preli RB, Potvin Klein K, Herrington DM. 2002. Vascular effects of dietary L-arginine supplementation. Atherosclerosis 162:1-15.
  • Pretnar-Oblak J, Sabovic M, Zaletel M. 2007. Associations between systemic and cerebral endothelial impairment determined by cerebrovascular reactivity to L-arginine. Endothelium 14:73-80.
  • Rajapakse NW, Mattson DL. 2009. Role of L-arginien in nitric oxide production in health and hypertension. Clinical and Experimental Pharmacology and Physiology 36:249-255.
  • Ruel M, Beanlands RS, Lortie M, Chan V, Camack N, deKemp RA, Suuronen EJ, Rubens FD, DeSilva JN, Sellke FW, Steward DJ, Mesana TG. 2008. Concominant treatment with oral L-arginine improves the efficacy of surgical angiogenesis in patients with severe diffuse coronary artery disease: The Endothelial Modulation in Angiogenic Therapy randomized clinical trial. The Journal of Thoracic and Cardiovascular Surgery 135:762-770.
  • Rytlewski K, Olszanecki R, Lauterbach R, Grzyb A, Basta A. 2006. Effects of oral L-arginine on the foetal condition and neonatal outcome in preeclampsia: A preliminary study. Basic & Clinical Pharmacology & Toxicology 99:146-152.
  • Rytlewski K, Olszanecki R, Lauterbach R, Grzyb A, Kiec-Wilk B, Dembinska-Kiec, Basta A. 2008. Effects of oral L-arginine on the pulsatility indices of umbilical artery and middle cerebral artery in preterm labor. European Journal of Obstetrics & Gynecology and Reproductive Biology 138:23-28.
  • Santos RS, Pacheco MTT, Martins RABL, Vilaverde AB, Giana HE, Baptista F, Zângaro RA. 2002. Study of the effect of oral administration of L-arginine on muscular performance in healthy volunteers: An isokinetic study. Isokinetics and Exercise Science 10:153-158.
  • Shiraki T, Takamura T, Kajiyama A, Oka T, Saito D. 2004. Effect of short-term administration of high dose L-arginine on restenosis after percutaneous transluminal coronary angioplasty. Journal of Cardiology 44(1):13-20.
  • Siasos G, Tousoulis D, Vlachopoulos C, Antoniades C, Stefanadi E, Ioakeimidis N, Zisimos K, Siasou Z, Papavassiliou AG, Stefanadis C. 2009. The impact of oral L-arginine supplementation on acute smoking-induced endothelial injury and arterial performance. American Journal of Hypertension 22(6):586-592.
  • Stanislavov R, Nikolova V, Rohdewald P. 2008. Improvement of erectile function with Prelox: a randomized, double-blind, placebo-controlled, crossover trial. International Journal of Impotence Research 20:173-180
  • Stanislavov R, Nikolova V. 2003. Treatment of erectile dysfunction with pycnogenol and L-arginine. Journal of Sex & Marital Therapy 29(3):207-213
  • Stein S, Todd P, Mahoney J. 1970. The arginine requirement for nucleocapsid maturation in Herpes simplex virus development. Canadian Journal of Microbiology 16:851-854.
  • Swanson B, Keithley JK, Zeller JM, Sha BE. 2002A pilot study of the safety and efficacy of supplemental arginine to enhance immune function in persons with HIV/AIDS. Nutrition 18(7-8):688-690.
  • Tankersley RW Jr. 1963. Aminio acid requirements of herpes simplex virus in human cells. Journal of Bacteriology 87(3):609-613.
  • Tausoulis D, Antoniades C, Tentolouris C, Goumas G, Stefanadis C, Toutouzas P. 2002. L-Arginine in cardiovascular disease: dream or reality? Vascular Medicine 7:203-211.
  • Watanabe G, Tomiyama H, Doba N. 2000. Effects of oral administration of L-arginine on renal function in patients with heart failure. Journal of hypertension 18(2):229-234
  • Yin W-H, Chen J-W, Tsai C, Chiang M-C, Young MS, Lin S-J. 2005. L-Arginine improves endothelial function and reduces LDL oxidation in patients with stable coronary artery disease. Clinical Nutrition 24:988-997.

Appendix 1: Examples of appropriate dosage preparations, frequencies of use and directions for use

  • 6 g, 2 times per day (Doutreleau et al. 2010)
  • 6 g, 2 times per day (Doutreleau et al. 2006)
  • 1 g, 3 times per day (Evans et al. 2004)
  • 3 g, 3 times per day (Evans et al. 2004)
  • 7 g, 3 times per day (Evans et al. 2004)
  • 3 g, 2 times per day (Lim et al. 2004)
  • 2 g, 3 times per day (Palloshi et al. 2004)
  • 8 g, 2 times per day (Bode-Boger et al. 2003)
  • 2 g, 3 times per day (Bednarz et al. 2000)
  • 3 g + 2 g + 3 g, per day (Hambrecht et al. 2000)
  • 3 g, 3 times per day (Lerman et al. 1998)
  • 7 g, 3 times per day (Adams et al. 1997)
  • 2 g, 3 times per day (Ceremuzynski et al. 1997)
  • 7 g, 3 times per day (Clarkson et al. 1996)
  • 2.8 g, 2 times per day (Rector et al. 1996)
  • 4.2 g, 3 times per day (Rector et al. 1996)


Background information:

  • L-Arginine is a conditionally essential amino acid (IOM 2006).
  • L-Arginine plays a role in the formation of important physiologic factors, including nitric oxide (NO, a vasodilator), urea (an excretory product), creatine (required for storage of high-energy phosphates), all proteins (as a part of the structures), and growth hormone release (Shao and Hathcock 2008).
  • In healthy adults with adequate protein intakes, L-Arginine is synthesized by the body in sufficient quantity to meet physiologic needs. It is only under specific diseased states such as congenital defects or catabolic states that supplementation is essential (Shils et al. 2006; IOM 2005).
  • The claim "May help support a modest improvement in exercise capacity in individuals with stable cardiovascular diseases" is based on evidence from clinical trials showing that L-Arginine supplementation, in patients with cardiovascular diseases (CVD), may enhance their endurance exercise tolerance or exercise capacity, an important measuring factor of daily-life activity (Doutreleau et al. 2010; Doutreleau et al. 2006; Nagaya et al. 2001; Bednarz et al. 2000; Ceremuzynski et al. 1997; Rector et al. 1996). The claim is also based on its mechanism of action, where clinical trials showed that L-Arginine supplementation enhances endothelium-dependant vasodilation by increasing nitric oxide (NO) production in these patients, who have lower levels of NO (Lim et al. 2004; Palloshi et al. 2004; Bode- Böger et al. 2003; Lekakis et al. 2002; Sydow et al. 2002; Nagaya et al. 2001; Hambrecht et al. 2000; Lerman et al. 1998; Adams et al. 1997; Clarkson et al. 1996). Increasing NO production through L-Arginine supplementation might therefore be beneficial by restoring vasodilatation and improving muscular metabolism in patients with cardiovascular compromised systems.
  • The minimum dose for the claim "L-Arginine is a non-essential amino acid that is involved in protein synthesis" is based on 5% of the daily average intake, i.e. 4.2 g per day (IOM 2005).
  • The maximum dose where no duration of use is required is based on 10% of the daily average intake.