NOW Foods
L-Arginine Double Strength 1000 mg
70/100
SUPPIE SCORE
75/100
EFFICACY
High
SAFETY
52/100
CLEANLINESS
What Does L-Arginine Double Strength 1000 mg Do?
This double-strength L-Arginine supplement offers good evidence-based support for nitric oxide production and cardiovascular benefits at effective 1000 mg doses, with low safety risks for healthy adults, though interactions and contraindications warrant medical consultation.
What are the potential cardiovascular benefits of L-Arginine supplementation?
How does L-Arginine support athletic performance and recovery?
What dosage of L-Arginine is recommended for nitric oxide production?
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What Are the Benefits of L-Arginine Double Strength 1000 mg?
Based on proven scientific research
Nitric Oxide ProductionStrong
Blood Pressure ReductionModerate
Erectile Function ImprovementModerate
Protein Synthesis SupportMild
Ammonia DetoxificationMild
Good For:
What Are the Side Effects of NOW Foods L-Arginine Double Strength 1000 mg?
Always consult your health practitioner if in doubt.
RiskLow Risk
Overview
•L-Arginine at 1000 mg doses is generally safe for healthy adults, but may cause gastrointestinal side effects like nausea and diarrhea in sensitive individuals.
•Potential interactions with antihypertensives, anticoagulants, and antidiabetic medications; consult physician if on these drugs.
•Dosage of 2 g daily (1-2 tablets) aligns with safe limits from studies, below typical upper intake of 9 g/day.
•Not recommended for pregnant or breastfeeding women, or those with asthma, renal disease, glaucoma, herpes simplex, or recent myocardial infarction.
•No major allergens in this vegetarian formulation; produced in GMP facility but may trace common allergens.
•Long-term use requires monitoring for blood pressure changes and renal function in at-risk populations.
Potential Side Effects
Negative Interactions
Inactive Ingredients
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
Low Risk
What Are the Ingredients in NOW Foods L-Arginine Double Strength 1000 mg?
L-Arginine (from L-Arginine HCl)
1000 mg
Microcrystalline Cellulose
Hydroxypropyl Cellulose
Stearic Acid (vegetable source)
Croscarmellose Sodium
Silicon Dioxide
Hypromellose (cellulose)
Calcium Carbonate
Glycerin
Sources & References
31922465
Information from pubmed.ncbi.nlm.nih.gov
Www.fruitfulyield.com
Information from www.fruitfulyield.com
PMC5021928
Information from pmc.ncbi.nlm.nih.gov
Arginine heart benefits and side effects
Information from www.webmd.com
PMC11589976
Information from pmc.ncbi.nlm.nih.gov
L arginine 1000 mg double strength tablets
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PMC8761475
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L arginine.html
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PMC10393177
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Supplement guide l arginine
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22137067
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B00QVLSD1A
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S41598 025 16374 x
Information from www.nature.com
PMC6683098
Information from pmc.ncbi.nlm.nih.gov
B00L83XT6A
Information from www.amazon.com
PMC10179183
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Art 20364681
Information from www.mayoclinic.org
L arginine double strength 1000 mg tablets
Information from www.nowfoods.com
PMC5510020
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PMC9710401
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Products
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Now sports l arginine double strength informed sport certified
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Information from pmc.ncbi.nlm.nih.gov
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PMC8995264
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Faq 20058052
Information from www.mayoclinic.org
353199237775
Information from www.ebay.com
PMC3517635
Information from pmc.ncbi.nlm.nih.gov
PMC12429782
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PMC8257534
Information from pmc.ncbi.nlm.nih.gov
Now foods l arginine 1 000 mg 120 tablets
Information from www.iherb.com
PMC11876448
Information from pmc.ncbi.nlm.nih.gov
PMC7851093
Information from pmc.ncbi.nlm.nih.gov
1811061666
Information from www.walmart.com
17143054
Information from pubmed.ncbi.nlm.nih.gov
L arginine.html
Information from www.drugs.com
Products
Information from www.professionalsupplementcenter.com
PMC12566733
Information from pmc.ncbi.nlm.nih.gov
10 1072
Information from f1000research.com
L arginine
Information from www.webmd.com
27753625
Information from pubmed.ncbi.nlm.nih.gov
PMC2129157
Information from pmc.ncbi.nlm.nih.gov
34251644
Information from pubmed.ncbi.nlm.nih.gov
PMC8997670
Information from pmc.ncbi.nlm.nih.gov
Frequently Asked Questions
Common questions about NOW Foods L-Arginine Double Strength 1000 mg