NOW L-Arginine 700 mg

• 700 mg pharmaceutical-grade L-Arginine per capsule
• Free-form L-Arginine amino acid
• Conditionally essential amino acid
• Important precursor to nitric oxide (NO)*
• Supports normal blood vessel relaxation and vascular function*
• Participates in healthy circulation and vascular signaling*
• Supports normal protein synthesis and production*
• Important for nitrogen metabolism and the urea cycle*
• Helps the body process ammonia produced during protein metabolism*
• Participates in normal cellular and metabolic functions*
• Popular amino acid in sports nutrition and cardiovascular wellness formulas
• Single-active-ingredient formula without proprietary blends
• Pharmaceutical-grade L-Arginine
• Convenient 1-capsule serving
• Non-GMO
• Vegetarian and vegan
• Made without wheat, gluten, soy, milk, eggs, fish, shellfish, tree nuts, or sesame ingredients
• Kosher (Triangle K)
• GMP Quality Assured
• Made and quality tested in the USA with globally sourced ingredients

• Nitric Oxide Production: L-Arginine serves as a substrate for nitric oxide synthase, an enzyme responsible for producing nitric oxide. This signaling molecule contributes to normal blood vessel relaxation and vascular function.*
• Healthy Circulation: Nitric oxide plays an important role in regulating vascular tone and supporting normal blood flow. L-Arginine supplies a precursor used in this natural physiological process.*
• Cardiovascular Wellness: By participating in nitric oxide production, L-Arginine contributes to pathways involved in endothelial function, vascular signaling, and normal cardiovascular physiology.*
• Protein Synthesis: L-Arginine is an amino acid used in protein production and contributes to normal tissue maintenance, cellular growth, and metabolic processes.*
• Nitrogen Metabolism: L-Arginine plays a central role in the urea cycle, helping the body convert ammonia generated during amino acid metabolism into urea for elimination.*
• Exercise & Muscle Function: L-Arginine is commonly included in sports nutrition formulas because of its role in nitric oxide production. Research examining exercise-performance improvements from oral L-Arginine has produced mixed results, particularly at lower doses.*
• Conditionally Essential Nutrition: Although the body normally produces L-Arginine, requirements may exceed endogenous production during certain physiological circumstances, including periods of growth or significant metabolic stress.*
• Cellular Function: L-Arginine participates in multiple biological pathways, including protein synthesis, nitrogen regulation, and the production of compounds involved in cellular metabolism.*
• Convenient Amino Acid Supplementation: Each capsule delivers 700 mg of free-form L-Arginine without requiring powders, mixing, or complex supplement combinations.

• L-Arginine (Free-Form) — 700 mg: A conditionally essential amino acid involved in nitric oxide synthesis, urea metabolism, protein production, and normal cellular function. L-Arginine serves as a precursor to nitric oxide, which participates in healthy blood vessel relaxation and vascular signaling. It also plays an important role in the urea cycle, helping the body process nitrogen-containing metabolic waste. NOW uses pharmaceutical-grade, free-form L-Arginine, providing 700 mg in each vegetable capsule.*

L-Arginine is a conditionally essential amino acid involved in several important biochemical processes throughout the body. One of its most recognized functions is serving as a precursor to nitric oxide (NO), a signaling molecule produced through the action of nitric oxide synthase enzymes. During this process, L-Arginine is converted into nitric oxide and L-citrulline. Nitric oxide helps regulate vascular tone by signaling smooth muscle cells within blood vessel walls to relax, contributing to normal blood flow and cardiovascular function. L-Arginine also participates in the urea cycle, a metabolic pathway that converts ammonia generated during protein and amino acid metabolism into urea for elimination through the kidneys. Additionally, L-Arginine is used in normal protein synthesis and contributes to cellular maintenance and tissue function. Although the body can produce L-Arginine under ordinary conditions, it is considered conditionally essential because requirements may increase during certain physiological circumstances. NOW L-Arginine 700 mg supplies pharmaceutical-grade, free-form L-Arginine in a convenient capsule format to complement dietary amino acid intake and support these normal metabolic processes. The extent to which supplemental L-Arginine increases nitric oxide availability or improves exercise performance varies according to dose, individual physiology, and health status, and specific performance benefits have not been established for this finished product.*

• Pharmaceutical-Grade L-Arginine: NOW identifies the amino acid used in this product as pharmaceutical grade, reflecting defined ingredient quality specifications.
• 700 mg Per Capsule: Provides a higher amount of L-Arginine per capsule than the NOW 500 mg version.
• Free-Form Amino Acid: Supplies L-Arginine as an individual amino acid rather than bound within an intact protein source.
• Single Active Ingredient: Focuses on L-Arginine without additional stimulants, proprietary blends, or multi-ingredient performance complexes.
• Nitric Oxide Precursor: Provides an amino acid directly involved in the body's normal production of nitric oxide.
• Multiple Metabolic Roles: L-Arginine participates in nitric oxide synthesis, protein production, nitrogen metabolism, and the urea cycle.
• Vegetarian & Vegan: Uses a hypromellose vegetable cellulose capsule rather than animal-derived gelatin.
• Non-GMO: Identified as a Non-GMO supplement.
• Common Allergen Exclusions: Not manufactured with wheat, gluten, soy, milk, eggs, fish, shellfish, tree nuts, or sesame ingredients. Produced in a GMP facility that also processes ingredients containing these allergens.
• Kosher: Packaging displays the Triangle K Kosher designation.
• GMP Quality Assured: Manufactured under NOW's supplement quality program, with GMP certification and manufacturing quality controls.
• Quality Tested in the USA: Made and quality tested in the United States using globally sourced ingredients.
• Minimal Other Ingredients: Contains hypromellose, ascorbyl palmitate, and silicon dioxide.
• Recycled Packaging: The bottle is made from 100% post-consumer recycled (PCR) resin.
• Convenient Daily Serving: One capsule provides the complete labeled 700 mg serving.
• 180-Capsule Bottle: Provides 180 labeled servings, offering excellent convenience for regular supplement users.

• Adults seeking supplemental L-Arginine as part of their daily nutrition routine
• People interested in supporting normal nitric oxide production*
• Adults seeking nutritional support for healthy vascular function*
• Individuals interested in amino acids involved in cardiovascular physiology*
• Fitness enthusiasts researching nitric oxide precursor supplements
• Active adults interested in the role of L-Arginine in normal muscle and vascular function*
• People looking to support normal protein synthesis and amino acid metabolism*
• Individuals interested in the urea cycle and normal nitrogen metabolism*
• Those who prefer a single-amino-acid supplement rather than a complex performance blend
• People who prefer capsules instead of L-Arginine powders
• Adults looking for a convenient 700 mg capsule serving
• Vegetarian and vegan supplement users
• Those seeking a Non-GMO amino acid supplement
• Adults who value pharmaceutical-grade ingredients and GMP manufacturing standards
• People seeking a larger 180-capsule bottle for ongoing supplementation
• Not suitable for individuals with certain cardiovascular, renal, or other medical conditions identified in the product warnings without appropriate medical guidance

• Take 1 capsule daily as needed.
• Take between meals or at bedtime.
• Consume with at least 8 oz of water or juice to facilitate absorption.
• Each capsule provides 700 mg of L-Arginine.
• Use only as directed on the current product label.
• Store in a cool, dry place after opening.
• Natural color variation may occur.
• Warnings: Take this product with at least 8 oz of water or juice. For adults only. Not for pregnant or nursing women. Consult a physician if taking medications, especially antihypertensives, anticoagulants, or antidiabetic drugs; if you have a medical condition, particularly asthma or renal disease; or if planning surgery. This product should be avoided by persons with glaucoma or herpes simplex unless otherwise prescribed by a physician. Do not use if you have had a myocardial infarction or have established coronary artery disease. Keep out of reach of children.

Hypromellose (cellulose capsule), ascorbyl palmitate, and silicon dioxide.

• What is NOW L-Arginine 700 mg?
  NOW L-Arginine 700 mg is a single-amino-acid dietary supplement that provides pharmaceutical-grade, free-form L-Arginine to support normal nitric oxide production, vascular function, protein synthesis, and nitrogen metabolism.*
• How much L-Arginine is in each capsule?
  Each vegetable capsule provides 700 mg of free-form L-Arginine.
• How is NOW L-Arginine 700 mg different from the 500 mg version?
  The 700 mg version provides 700 mg per capsule, compared with 500 mg per capsule in the other formula. The pictured 700 mg product contains 180 capsules and has a labeled serving size of one capsule. The products also have different suggested use instructions and other ingredients.
• What is L-Arginine?
  L-Arginine is a conditionally essential amino acid involved in protein synthesis, nitric oxide production, and the urea cycle. It occurs naturally in protein-containing foods and can also be produced by the body.
• What does conditionally essential mean?
  A conditionally essential amino acid is one the body can normally produce in sufficient amounts but may require in greater quantities during certain physiological conditions, including periods of growth or significant metabolic stress.
• What is nitric oxide?
  Nitric oxide (NO) is a signaling molecule naturally produced by the body. It participates in blood vessel relaxation, vascular signaling, and regulation of normal blood flow.
• How does L-Arginine support nitric oxide production?
  L-Arginine serves as a substrate for nitric oxide synthase enzymes, which convert it into nitric oxide and L-citrulline. Nitric oxide subsequently participates in processes involved in vascular relaxation.*
• Can L-Arginine support healthy circulation?
  L-Arginine participates in nitric oxide production, an important process in normal vascular function. However, supplemental L-Arginine does not guarantee increased circulation, and clinical results vary according to dosage and individual health status.*
• Does L-Arginine support cardiovascular health?
  L-Arginine contributes to nitric oxide-related pathways involved in normal vascular physiology. However, it is not a treatment for cardiovascular disease, and the product label specifically advises against use following myocardial infarction or in established coronary artery disease.
• Can L-Arginine improve muscle pumps during workouts?
  L-Arginine is commonly found in sports nutrition supplements because it is a nitric oxide precursor. However, clinical findings regarding exercise blood flow and muscle pumps are inconsistent, and the effectiveness of this specific 700 mg serving for those outcomes has not been established.
• Does L-Arginine improve exercise performance?
  Research involving oral L-Arginine supplementation has produced mixed results for strength, endurance, and other performance outcomes. Although it participates in nitric oxide production, a specific exercise-performance improvement is not guaranteed.
• Does L-Arginine help with protein synthesis?
  Yes. L-Arginine is an amino acid used as a building block for protein synthesis and contributes to normal cellular and tissue maintenance.*
• What role does L-Arginine play in the urea cycle?
  L-Arginine is an intermediate in the urea cycle, which converts ammonia produced during normal amino acid metabolism into urea for elimination from the body.
• What does pharmaceutical-grade L-Arginine mean?
  NOW identifies its L-Arginine ingredient as pharmaceutical grade, indicating that it is manufactured to defined quality and purity specifications. The finished product is still a dietary supplement rather than an FDA-approved medication.
• What is free-form L-Arginine?
  Free-form L-Arginine is supplied as an individual amino acid rather than being bound within an intact protein. It does not require the initial digestive breakdown of a complete protein structure.
• How should I take NOW L-Arginine 700 mg?
  NOW recommends taking one capsule daily as needed, between meals or at bedtime, with at least 8 oz of water or juice.
• When is the best time to take L-Arginine 700 mg?
  The manufacturer's directions specify taking it between meals or at bedtime. A particular clock time is not required.
• Should I take NOW L-Arginine with food?
  The supplied directions recommend taking the capsule between meals or at bedtime rather than specifically with food.
• Why should I take L-Arginine with 8 oz of water or juice?
  NOW specifically instructs users to take the supplement with at least 8 oz of water or juice to facilitate absorption.
• Can I combine L-Arginine with L-Citrulline?
  L-Arginine and L-Citrulline participate in related metabolic pathways and are sometimes combined in sports nutrition supplements. However, appropriate use depends on individual circumstances and medication interactions. Consult a healthcare professional before combining products intended to influence nitric oxide production.
• Can L-Arginine affect blood pressure?
  L-Arginine participates in nitric oxide production, which influences vascular relaxation. It may interact with blood-pressure medications. NOW specifically advises consulting a physician before use if taking antihypertensive drugs.
• Can I take NOW L-Arginine if I have heart disease?
  The product label advises against use if you have experienced myocardial infarction or have established coronary artery disease. People with cardiovascular conditions should seek medical guidance rather than self-supplementing.
• Can people with kidney disease take L-Arginine?
  NOW advises consulting a physician before use if you have renal disease. Suitability depends on kidney function and other medical considerations.
• Does L-Arginine interact with medications?
  Potential interactions include antihypertensive medications, anticoagulants, and antidiabetic drugs. Consult your physician or pharmacist before using L-Arginine if you take prescription medications.
• Who should avoid NOW L-Arginine 700 mg?
  The label advises against use by pregnant or nursing women and individuals who have had myocardial infarction or have established coronary artery disease. People with glaucoma or herpes simplex should avoid the product unless otherwise prescribed by a physician. Other medical precautions also apply.
• Is NOW L-Arginine 700 mg vegan?
  Yes. The product is labeled vegetarian and vegan and uses a cellulose-based capsule rather than animal-derived gelatin.
• Is NOW L-Arginine 700 mg Non-GMO?
  Yes. The product carries NOW's Non-GMO designation.
• Is NOW L-Arginine gluten-free?
  It is not manufactured with wheat or gluten ingredients. However, it is produced in a GMP facility that also processes ingredients containing common allergens.
• Does NOW L-Arginine contain caffeine or stimulants?
  No caffeine or conventional stimulant ingredients are listed. The sole active ingredient is L-Arginine.
• What are the other ingredients?
  Hypromellose (cellulose capsule), ascorbyl palmitate, and silicon dioxide.
• What is ascorbyl palmitate?
  Ascorbyl palmitate is a fat-soluble derivative of ascorbic acid used in some supplement formulations as an antioxidant ingredient. It is included among the inactive ingredients in this product.
• Is NOW L-Arginine Kosher?
  Yes. The supplied front label displays the Triangle K Kosher designation.
• Is NOW L-Arginine manufactured under GMP standards?
  Yes. The packaging identifies NOW's GMP Quality Assured program, and the supplied manufacturing information describes GMP certification and quality-control procedures.
• Where is NOW L-Arginine manufactured?
  The label states that the product is made and quality tested in the USA with globally sourced ingredients.
• Is the bottle made from recycled material?
  Yes. NOW identifies this bottle as being made from 100% post-consumer recycled (PCR) resin.
• How many capsules are in one bottle?
  Each bottle contains 180 vegetable capsules.
• How many servings are in one bottle?
  Each bottle provides 180 labeled servings, with one capsule per serving.
• How long does one bottle last?
  At the manufacturer's suggested intake of one capsule daily, a 180-capsule bottle provides a 180-day supply.
• Does NOW L-Arginine require refrigeration?
  No refrigeration requirement is stated. NOW recommends storing the product in a cool, dry place after opening.