L-Arginine 500 mg 100c by Now Foods – Nitric Oxide Precursor Amino Acid
L-Arginine 500 mg capsules by Now Foods provide a single amino acid in a 100-capsule bottle. This formula supplies free-form L-arginine, with 1 g (1,000 mg) in the manufacturer's two-capsule serving, rather than a blend of several amino acids.
Arginine is a conditionally essential amino acid: the body makes it, but its requirements can vary with physiological circumstances. It also comes from protein-containing foods. Choosing this product means adding arginine specifically, not replacing the broader range of amino acids supplied by dietary protein. Its role in normal metabolism is distinct from a promise of noticeable changes in exercise performance or circulation.
Key L-Arginine 500 mg 100c Benefits
- Provides arginine, a building block used in protein production throughout the body, including the proteins that make up everyday tissues.
- Supplies the starting material for nitric oxide, a signaling molecule involved in normal blood-vessel function and communication between cells.
- Contributes an amino acid involved in the urea cycle, helping the body manage nitrogen generated during protein metabolism.
How L-Arginine 500 mg 100c Works
Enzymes use arginine to produce nitric oxide. As a nitric oxide precursor, arginine supplies material for that process; nitric oxide then helps signal the smooth muscle surrounding blood vessels to relax. This is a normal physiological pathway, not a guarantee that taking additional arginine will change blood pressure or improve athletic results.
Arginine also participates in urea metabolism, the process that handles nitrogen left over when the body uses amino acids. These roles explain why arginine belongs to both protein nutrition and cellular signaling. Free-form describes the ingredient as an individual amino acid rather than one bound within an intact dietary protein.
Key Functional Ingredients Include:
- L-Arginine: Supplies the material enzymes use to make nitric oxide, a messenger that helps regulate blood-vessel relaxation and cell communication. Arginine is also a protein building block. These established nutritional roles explain the ingredient's purpose without making extra arginine a substitute for balanced protein intake.
L-Arginine 500 mg 100c Is Formulated For
- Adults considering a single-ingredient amino acid supplement rather than a multi-ingredient formula.
- Adults who want a measured capsule serving of free-form arginine and can follow the label's water and timing instructions.
- People whose healthcare practitioner has reviewed whether arginine fits their medications, medical history, and existing supplements.
Supplements support your health but do not replace a balanced diet. Always check with your healthcare practitioner before starting a new supplement. Ready to find the right fit? Access Now to schedule a consultation with our licensed wellness professionals at Holistic Health Partners, led by Carolyn Mulally BS, RN, HN-BC. You may also wish to explore our other Cardiovascular Supplements and Now Foods collections.
Recommendation: Take 2 capsules twice daily as needed. Take between meals or at bedtime with at least 8 oz. of water or juice to facilitate absorption.
Serving Size: 2 Veg Capsules
Servings Per Container: 50
L-Arginine (Free-Form) ... 1 g (1,000 mg)
** Daily Value not established.
The L-Arginine used in this product is pharmaceutical grade.
Other Ingredients: Hypromellose (cellulose capsule), Stearic Acid (vegetable source) and Silicon Dioxide.
Does Not Contain: Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Storage: Store in a cool, dry place after opening.
Natural color variation may occur in this product.
Additional arginine precautions: Oral arginine can cause nausea, abdominal pain, diarrhea, bloating, gout, headache, allergic reactions, or airway inflammation and worsening asthma. Anticoagulants and antiplatelet medicines, herbs, or supplements can increase bleeding risk when combined with arginine. Blood-pressure medicines, herbs, or supplements, nitrates, isoproterenol, and sildenafil can increase the risk of low blood pressure. Diabetes medicines, herbs, or supplements can increase the risk of low blood sugar; a clinician may need to adjust medication. Do not combine arginine with potassium-sparing diuretics such as amiloride, spironolactone, or triamterene because of the risk of high potassium. Review these combinations with your clinician before use.
Frequently Asked Questions About L-Arginine 500 mg 100c
What are the benefits of L-Arginine 500 mg 100c?
L-Arginine 500 mg 100c supplies free-form arginine, which the body uses for protein production and nitric oxide synthesis. Nitric oxide helps regulate blood-vessel relaxation and cell communication. Arginine also participates in the urea cycle, which handles nitrogen from protein metabolism. The two-capsule serving provides 1 g (1,000 mg). These are established roles of the amino acid, not a guarantee of better exercise performance or a reason to replace prescribed care.
Who should take L-Arginine 500 mg 100c?
This Now Foods formula is for adults considering targeted arginine supplementation rather than a broad amino acid blend. Each capsule contains 500 mg, and the label serving is two capsules. It is not for pregnant or nursing women. Adults taking medication, managing a medical condition, or planning surgery need physician guidance first. The label also excludes people with a previous myocardial infarction or established coronary artery disease and gives specific precautions for glaucoma and herpes simplex.
Are there any side effects of taking L-Arginine 500 mg 100c?
Arginine can cause digestive upset, headache, gout, allergic reactions, or worsening asthma. Use at least 8 oz. of water or juice. Adults only; not for pregnancy or nursing. Consult a physician about medications, medical conditions, especially asthma or renal disease, and planned surgery. Avoid with glaucoma or herpes simplex unless prescribed; do not use after myocardial infarction or with established coronary artery disease. Keep away from children. Interactions include bleeding, low blood pressure or blood sugar, and high potassium with potassium-sparing diuretics. Review anticoagulants, antiplatelets, antihypertensives, antidiabetics, nitrates, isoproterenol, sildenafil, and supplements with your clinician. See the complete warnings above.
How does L-Arginine 500 mg 100c support overall health?
Arginine connects several everyday processes: making proteins, handling nitrogen through the urea cycle, and supplying material for nitric oxide signaling. This formula provides arginine alone as its functional ingredient, so it does not supply all the amino acids found in dietary protein. Follow the label's timing between meals or at bedtime and its water instructions. Overall nutritional adequacy still depends on food choices; extra arginine is not automatically appropriate for every adult.
These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
