Product Introduction
L-Arginine is a semi-essential amino acid found in the protein of meat, poultry, fish, dairy, nuts and seeds. The body makes some of it, but demand can rise during growth, intense exercise or recovery, so it is widely added to dietary supplements and functional foods. As a China L-Arginine manufacturer, supplier and exporter, WEHENGFOOD™ supplies L-Arginine powder and granules to supplement brands, sports nutrition formulators and food manufacturers worldwide.
L-Arginine is best known as the body’s precursor for nitric oxide (NO), a signaling molecule that helps blood vessels relax. This is why it features so often in searches such as “L-Arginine benefits” and “nitric oxide supplement”. It also supplies nitrogen for the urea cycle and is used to make creatine and polyamines.
Certificate of Analysis
Items | Specification | Result |
Appearance | White crystals or crystalline power Has a characteristic odor | White crystalline power Has a characteristic odor |
IR Spectrum | Match with the standard | Conforms |
Assay,% | 98.5~101.5 | 99.2 |
Specific rotation | +26.3°~+27.7° | +27.2° |
Chloride (Cl),% | ≤0.05 | <0.05 |
Sulfate,% | ≤0.03 | <0.03 |
Iron ,ppm | ≤30 | <30 |
Heavy metals, ppm | ≤15 | <15 |
Residue on ignition, % | ≤0.30 | 0.01 |
Loss on drying, % | ≤0.50 | 0.04 |
Chromatographic purity(TLC),% | Total impurity≤2.0 | Conforms |
Key Functions and Benefits
- Nitric oxide production: L-Arginine is the substrate for nitric oxide synthase. It supports normal blood vessel dilation and circulation, the basis of its use in cardiovascular and pre-workout formulas.
- Sports nutrition: It is a common ingredient in pre-workout powders, often alongside L-Citrulline, which the body converts into arginine. Formulators often combine the two, and the L-Citrulline vs L-Arginine question is a frequent one on the buyer side. Clinical results for exercise performance are mixed, so product claims should stay within local regulations.
- Protein metabolism and nitrogen balance: It takes part in the urea cycle, which helps the body process and remove ammonia.
- Immune and wound-healing support: L-Arginine is often included in clinical and recovery nutrition products because of its role in protein synthesis and cell function.
- Creatine synthesis: It is one of the three amino acids (with glycine and methionine) the body uses to make creatine.
- Blood pressure research: Studies have examined L-Arginine’s effect on blood pressure and endothelial function, with modest and varying results. Brands should follow regulations on health claims in their target market.
Applications
- Dietary supplements: capsules, L-Arginine tablets (including the popular 1000 mg format), powders, sachets and granules
- Sports and pre-workout nutrition: powder blends, often with L-Citrulline and other amino acids
- Functional foods and beverages: ready-to-mix drinks, nutrition bars, and fortified foods
- Clinical and medical nutrition: formulas for recovery, aging and special dietary needs
- Compound amino acid blends: combined with L-Lysine, L-Carnitine, Taurine, zinc or vitamins
- Animal nutrition: some feed and pet nutrition formulations
Usage and Dosage Notes
Typical supplement products supply about 1–3 g per serving, and many finished products are labelled for daily intakes of 3–6 g, usually split across the day. Actual dosage, labelling and permitted claims vary by country, so formulators should check local regulations and, for products aimed at specific health conditions, consult regulatory advice. High single doses can cause stomach upset, bloating or diarrhea. People with low blood pressure, those taking blood pressure medication or nitrate drugs, and pregnant or breastfeeding women should seek medical advice before use.
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FAQ
Q1: What is L-Arginine used for?
L-Arginine is a semi-essential amino acid the body uses to produce nitric oxide, and it also takes part in protein metabolism and the urea cycle. It is widely used in sports nutrition, dietary supplements, functional beverages and clinical nutrition products.
Q2: What is the difference between L-Arginine and L-Citrulline?
L-Citrulline is a related amino acid that the body converts into L-Arginine. Many pre-workout formulas combine the two or use L-Citrulline as an alternative. Some research suggests L-Citrulline raises blood arginine levels more effectively, while L-Arginine is the direct precursor and more familiar to consumers. The better choice depends on the product, claims and cost.
Q3: In what forms is L-Arginine supplied?
L-Arginine is supplied as a white crystalline powder or in granules. Powder suits blending and sachet or stick-pack products, while granules flow better and suit L-Arginine tablet pressing, including 1000 mg tablets.
Q4: How much L-Arginine is typically used per day, and are there side effects?
Supplement products commonly provide about 1–3 g per serving, with daily intakes labelled around 3–6 g. High doses may cause stomach upset, bloating or diarrhea. People with low blood pressure, those on blood pressure or nitrate medication, and pregnant or breastfeeding women should consult a doctor before use. Dosage and permitted claims vary by country.
Q5: Do you supply both food grade and feed grade L-Arginine?
Yes. Food grade L-Arginine is used in supplements, foods and beverages, while feed grade L-Arginine is used in animal nutrition, such as poultry, swine, aquafeed and pet food, to balance the amino acid profile of the diet. The two grades follow different standards and are not interchangeable for regulatory purposes, so please tell us the end use when you inquire.
Q6: Are you a China L-Arginine manufacturer and supplier?
Yes. WEHENGFOOD™ is a China L-Arginine supplier and exporter serving supplement brands, food manufacturers and feed buyers worldwide. The minimum order is 100 KGS. We provide COA, MSDS and specification documents with every shipment.
