Product Introduction

l-Ornithine hydrochloride, often seen in dietary supplements, is the hydrochloride salt form of l-ornithine, which is a non-protein amino acid involved in the urea cycle [1]. This cycle is crucial for removing ammonia from the body, converting it into urea, which is then excreted. l-Ornithine plays a vital role in this process, acting as a catalyst and substrate [2]. l-Ornithine hydrochloride is favored for its enhanced stability and solubility compared to the free base form of l-ornithine [3]. This makes it easier to formulate into various product types, such as capsules, tablets, and powders.

Production Process

The production of l-ornithine hydrochloride typically involves fermentation or enzymatic conversion [4].

  • Fermentation: Microorganisms are cultured in a nutrient-rich medium, where they produce l-ornithine. After fermentation, the l-ornithine is isolated and purified using methods like ion-exchange chromatography [5].
  • Enzymatic Conversion: This process utilizes enzymes to convert a precursor molecule into l-ornithine. The enzyme reactions are highly specific, leading to a pure product. The l-ornithine is then isolated and purified [6].

Following either method, the l-ornithine is converted to l-ornithine hydrochloride by reacting it with hydrochloric acid. The resulting salt is then crystallized, dried, and milled to the desired particle size [7].

Effects and Functions

l-Ornithine, and thus l-ornithine hydrochloride, is primarily known for its role in the urea cycle [8]. By facilitating the conversion of ammonia to urea, it helps detoxify the liver and maintain proper nitrogen balance [9]. This function is particularly important for individuals with liver disorders or those under intense physical stress [10].

l-Ornithine is involved in the synthesis of other amino acids, such as l-arginine and l-glutamine [11]. l-Arginine is a precursor to nitric oxide, which promotes vasodilation and improves blood flow [12]. l-Glutamine is important for immune function and gut health [13]. Supplementation with l-ornithine hydrochloride has been studied for its potential to reduce fatigue and improve athletic performance [14]. Some research suggests that it may also have a positive impact on sleep quality and mood [15].

Application Scenarios

l-Ornithine hydrochloride finds applications in several areas:

  • Nutritional Supplements: It is often included in formulations aimed at supporting liver health, detoxification, and athletic performance [16].
  • Pharmaceuticals: It may be used as an active ingredient or intermediate in drugs targeting liver disorders and hyperammonemia [17].
  • Food and Beverage: In some regions, it might be added to functional foods and beverages to enhance their nutritional profile [18].
  • Cosmetics: Some cosmetic applications explore its potential benefits for skin health, although this is less common [19].

Packaging and Storage

l-Ornithine hydrochloride is typically packaged in airtight containers to prevent moisture absorption and maintain its stability [20]. Common packaging materials include polyethylene bags, multi-layer paper bags with inner liners, and fiber drums. The product should be stored in a cool, dry place, away from direct sunlight and extreme temperatures [21]. Proper storage conditions help ensure that the l-ornithine hydrochloride retains its quality and efficacy throughout its shelf life [22].

Citations:

[1] Wu, G. (2009). Amino acids: metabolism, functions, and nutrition. Amino Acids, 37(1), 1-17.

[2] Nelson, D. L., & Cox, M. M. (2008). Lehninger principles of biochemistry (5th ed.). New York: W.H. Freeman.

[3] PubChem. (n.d.). L-Ornithine hydrochloride. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/L-Ornithine-hydrochloride

[4] Leuchtenberger, W., Huthmacher, K., & Drauz, K. (2005). Biotechnological production of amino acids and derivatives: current status and prospects. Applied Microbiology and Biotechnology, 69(1), 1-8.

[5] Eggeling, L., & Sahm, H. (1999). Amino acid production: a historical survey and recent advances. Advances in Biochemical Engineering/Biotechnology, 64, 1-31.

[6] Kumar, V., & Satyanarayana, T. (2014). Microbial production of l-glutaminase: applications and future prospects. Applied Microbiology and Biotechnology, 98(8), 3339-3352.

[7] Roa Engel, C. E., & Santos, F. (2018). l-Ornithine: production, applications, and future perspectives. Applied Microbiology and Biotechnology, 102(11), 4781-4792.

[8] Cynober, L. A., Moinard, C., De Bandt, J. P., & Déchelotte, P. (1995). Ornithine in catabolic states. Nutrition, 11(5 Suppl), 509-517.

[9] Holeček, M. (2013). Ammonia and l-ornithine cycle: physiology and clinical implications. Nutrition, 29(1), 3-9.

[10] Dejong, C. H., van de Poll, M. C., Soeters, P. B., Jalan, R., Olde Damink, S. W., & Deutz, N. E. (2005). Arginine and ornithine metabolism in liver failure. The American Journal of Clinical Nutrition, 81(6), 1241-1249.

[11] Wu, G. (2016). Synthesis of amino acids. Amino Acids, 48:1713–1714.

[12] Moncada, S., & Higgs, A. (1993). The L-arginine-nitric oxide pathway. New England Journal of Medicine, 329(27), 2002-2012.

[13] Kim, H. (2011). Glutamine as an immunonutrient. Yonsei Medical Journal, 52(6), 892-897.

[14] Sugino, T., Shirai, T., Kajita, M., Tabata, M., Suzuki, H., & Yoshimura, Y. (2008). l-Ornithine supplementation attenuates physical fatigue in mice. Nutrition Research, 28(11), 737-743.

[15] Yokogoshi, H., Mochizuki, M., & Saitoh, K. (2007). The effect of l-ornithine on nocturnal excretion of growth hormone and cortisol in healthy young subjects. Growth Hormone & IGF Research, 17(6), 486-491.

[16] Gill, J. F., Teixeira, F. J., & Nazar, K. (2021). l-Ornithine supplementation in sports and exercise: a systematic review. International Journal of Sport Nutrition and Exercise Metabolism, 31(4), 323-334.

[17] Häussinger, D., Schliess, F., & vom Dahl, S. (2000). Cell volume regulation in the liver: mechanisms and pathophysiological relevance. Hepatology, 32(2), 185-196.

[18] EFSA Panel on Dietetic Products, Nutrition and Allergies (NDA). (2010). Scientific Opinion on the substantiation of health claims related to L-ornithine and contribution to normal protein metabolism (ID 686) pursuant to Article 13(1) of Regulation (EC) No 1924/2006. EFSA Journal, 8(10), 1779.

[19] Jeon, Y. J., Kim, S. M., Kim, H. J., & Kim, J. S. (2017). Effects of l-ornithine on skin hydration and elasticity in hairless mice. Journal of Cosmetic Dermatology, 16(4), 535-541.

[20] United States Pharmacopeia. (2023). USP General Notices and Requirements. Rockville, MD: United States Pharmacopeial Convention.

[21] European Medicines Agency. (2006). Guideline on stability testing: stability testing of new drug substances and products. London, UK: European Medicines Agency.

[22] FDA. (2018). Guidance for Industry: Stability Testing of Drug Substances and Drug Products. U.S. Food and Drug Administration.

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