L-Arginine Pure Powder

L-Arginine Pure Powder

Best Naturals4.7 (158 ratings)
Format:Powder Quantity: 1 lb(s) · 98 servings
Goals
$17.43 $0.17 per serving

Product analysis

59 out of 100

L-Arginine Pure Powder offers inexpensive arginine, which the body uses to make a substance involved in blood-vessel function. Exercise results are inconsistent, so a reliable energy or performance boost should not be expected.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality20

Arginine form quality cannot be judged confidently because its preparation is unspecified. The ingredient name alone does not establish a quality advantage.

Ingredient Transparency63

The stated amount makes serving comparisons easier. Missing form detail limits a closer comparison of the preparation.

Value For Money100

Arginine is inexpensive by the gram. That supports favorable value if arginine is the ingredient you want to buy.

Customer Satisfaction73

Customer feedback is very positive across a moderate number of ratings. The feedback does not establish better exercise performance.

Product Focus67

A single ingredient keeps the formula focused on arginine and its connection to blood-vessel function. The mechanism does not reliably predict better energy, strength or endurance.

Format
Powder
Container
1 lb(s)
Per serving
$0.17
Customer rating
4.7 · 158 ratings
Report analysis

Goals

Cardiovascular Support
Impact
High effect
A Ingredient FitD PathwaysB- EvidenceA+ Formulation Logic
Arginine · 4600 mg

Arginine is a precursor used to make nitric oxide, which is involved in blood-vessel function. That mechanism does not establish a routine cardiovascular benefit from this 4.6 g serving. A small trial in healthy adults did not show significant blood-pressure reduction at higher daily amounts, so the saved contribution should not be read as demonstrated blood-pressure or cardiovascular-event protection.

How this product is rated for Cardiovascular Support

Ingredient fit93

Arginine is the main assessed active, with a direct connection to the supplied cardiovascular findings; links to other goals reduce specificity.
Goal fit
Arginine is the main assessed active, with a direct connection to the supplied cardiovascular findings; links to other goals reduce specificity.
Dose adequacy
The declared amount receives partial support against the supplied reference, which is not a proven effective cardiovascular dose.

Pathways48

Coverage centers on vessel-lining nitric-oxide function; cholesterol binding, triglyceride metabolism and other routes receive no contribution.
Depth
Arginine is associated with the vessel-lining nitric-oxide route in the saved findings; the mechanism alone does not establish clinical benefit.
Breadth
Coverage centers on vessel-lining nitric-oxide function; cholesterol binding, triglyceride metabolism and other routes receive no contribution.

Evidence74

Arginine leads the saved comparison, but supplied context does not establish routine cardiovascular benefit from supplementation.
Evidence strength
Arginine leads the saved comparison, but supplied context does not establish routine cardiovascular benefit from supplementation.
Studied preparation
The contributing preparation meets the saved preparation criteria; this does not establish equivalence across trial populations or superior delivery-form efficacy.

Formulation logic100

No required partner is missing from the contributing ingredients; no additional combination benefit is established. No configured ingredient conflict was identified in the supplied findings.
Partner coverage
No required partner is missing from the contributing ingredients; no additional combination benefit is established.
Conflicts
No configured ingredient conflict was identified in the supplied findings.
Effective doses
The contributing ingredients meet the saved amount criterion; this is not a clinically proven minimum effective cardiovascular dose.
Study evidence
Arginine Supportive 47 studies
Fitness
Impact
Moderate effect
A- Ingredient FitD- PathwaysC- EvidenceA+ Formulation Logic
Arginine · 4600 mg

Arginine at 4.6 g is a nitric-oxide precursor with a connection to blood flow. Performance trials are limited and conflicting, so this mechanism does not reliably predict better endurance, strength or workout results.

How this product is rated for Fitness

Ingredient fit86

The assessed ingredients are closely focused on fitness, although the formula is also linked to other goals. The assessed amounts provide partial coverage of the saved reference levels, with undisclosed quantities limiting the assessment.
Goal fit
The assessed ingredients are closely focused on fitness, although the formula is also linked to other goals.
Dose adequacy
The assessed amounts provide partial coverage of the saved reference levels, with undisclosed quantities limiting the assessment.

Pathways44

The strongest saved connection is blood flow and nitric oxide, with moderate coverage. One fitness pathway reaches the saved coverage threshold; the wider range of pathways remains uncovered.
Depth
The strongest saved connection is blood flow and nitric oxide, with moderate coverage.
Breadth
One fitness pathway reaches the saved coverage threshold; the wider range of pathways remains uncovered.

Evidence60

Arginine supplies the strongest saved evidence finding at the assessed amount; the scope of its actual cognitive evidence still matters. The effective entries are classified as studied preparations in the saved findings.
Evidence strength
Arginine supplies the strongest saved evidence finding at the assessed amount; the scope of its actual cognitive evidence still matters.
Studied preparation
The effective entries are classified as studied preparations in the saved findings.

Formulation logic100

The assessed ingredients can work alone or have their required partner. No configured ingredient conflict was found in the supplied assessment. All assessed ingredients reach the saved minimum amount threshold.
Partner coverage
The assessed ingredients can work alone or have their required partner.
Conflicts
No configured ingredient conflict was found in the supplied assessment.
Effective doses
All assessed ingredients reach the saved minimum amount threshold.
Study evidence
Arginine No effect 23 studies
Impact
High effect
A+ Ingredient FitC PathwaysC+ EvidenceA+ Formulation Logic

Arginine participates in nitric oxide production, which connects it to blood flow during exercise. Performance findings are limited and inconsistent, so its 4,600 mg per serving does not establish a dependable increase in energy or reduction in fatigue.

How this product is rated for Energy

Ingredient fit96

Arginine is the product's single assessed ingredient; the energy connection is specific to its role. The assessed amounts meet the saved comparison references; this does not mean higher intake produces greater benefit.
Goal fit
Arginine is the product's single assessed ingredient; the energy connection is specific to its role.
Dose adequacy
The assessed amounts meet the saved comparison references; this does not mean higher intake produces greater benefit.

Pathways60

Blood flow and nitric oxide is the main covered mechanism, with substantial coverage from the assessed ingredients.
Depth
Blood flow and nitric oxide is the main covered mechanism, with substantial coverage from the assessed ingredients.
Breadth
Coverage is concentrated in blood flow and nitric oxide, rather than extending across several energy mechanisms.

Evidence66

The evidence supports specific ingredient roles and nutritional correction, without proving extra everyday energy in adequately nourished adults.
Evidence strength
Arginine provides the strongest assessed evidence connection; the population and intended use still limit what benefits can be expected.
Studied preparation
The assessed preparations meet the saved study criteria, without establishing identical effects in every population or regimen.

Formulation logic100

No missing partner or configured conflict was identified. The assessed ingredients meet the saved minimum amount check.
Partner coverage
The assessed ingredients do not depend on a missing partner for their assigned contribution.
Conflicts
No configured ingredient conflict was found in the supplied facts.
Effective doses
All ingredients included in this amount check clear its minimum comparison threshold; that threshold does not itself prove a noticeable benefit.
Study evidence
Arginine No effect 7 studies

Ingredients

IngredientAmount per servingScore
L-Arginine Hydrochloride
4600 mg 88
Gluten Free Adults 18–50 Sugar Free
Report overview
Arginine · 4600 mg OverallScore88
B- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value
Each serving provides 4.6 g of L-arginine hydrochloride, a higher amount in this comparison. The whole-product price works out to about $0.04 per gram of arginine.
How this ingredient is rated

Active Ingredient Quality & Bioavailability70

The recorded form is L-arginine hydrochloride.
Arginine Form & Sourcing Purity
The arginine is identified as L-arginine hydrochloride.

Dose, Safety & Label Transparency100

A serving provides 4.6 g of arginine, a higher amount in this evaluation.
Arginine Dose Per Serving
The recorded amount is 4.6 g of arginine per serving, which is considered higher in this evaluation.

Value100

The whole-product price works out to about $0.04 per gram of arginine, a relatively low cost for the amount supplied.
Price Per Gram of Arginine
Based on the whole-product price, the cost is about $0.04 per gram of arginine, which is relatively low in this comparison.
Report alternatives

Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Reassessment of the effect of oral l-arginine on blood pressure: A systematic review and meta-analysis based on ambulatory blood pressure monitoring.
    Shi Y; Liu Y; Zhou Z; Xu S; Luo P · Nitric oxide : biology and chemistry · 2026
    Meta-analysis202 participants5 studies pooledCardiovascular Support forArginine
  2. Effect of Long-Term L-Arginine Supplementation on Arterial Compliance and Metabolic Parameters in Patients with Multiple Cardiovascular risk Factors: Randomized, Placebo-Controlled Study.
    Guttman H; Zimlichman R; Boaz M; Matas Z; Shargorodsky M · Journal of cardiovascular pharmacology · 2024
    Randomized trial90 participantsCardiovascular Support forArginine
  3. Increase in fasting vascular endothelial function after short-term oral L-arginine is effective when baseline flow-mediated dilation is low: a meta-analysis of randomized controlled trials.
    Bai Y; Sun L; Yang T; Sun K; Chen J; Hui R · The American journal of clinical nutrition · 2009
    Meta-analysis492 participants13 studies pooledCardiovascular Support forArginine
  4. L-arginine improves endothelial function and reduces LDL oxidation in patients with stable coronary artery disease.
    Yin WH; Chen JW; Tsai C; Chiang MC; Young MS; Lin SJ · Clinical nutrition (Edinburgh, Scotland) · 2006
    Randomized trial31 participantsCardiovascular Support forArginine
  5. Oral L-Arginine Administration Improves Anthropometric and Biochemical Indices Associated With Cardiovascular Diseases in Obese Patients: A Randomized, Single Blind Placebo Controlled Clinical Trial.
    Dashtabi A; Mazloom Z; Fararouei M; Hejazi N · Research in cardiovascular medicine · 2016
    Randomized trial90 participantsCardiovascular Support forArginine
  6. Investigation of the effect of nitrate and L-arginine intake on aerobic, anaerobic performance, balance, agility, and recovery in elite taekwondo athletes.
    Kavcı Z; Ozan M; Buzdağlı Y; Savaş A; Uçar H · Journal of the International Society of Sports Nutrition · 2024
    Randomized trial15 participantsEnergy forArginine
  7. The Effects of Arginine-Based Supplements on Fatigue Levels following COVID-19 Infection: A Prospective Study in Romania.
    Turcu-Stiolica A; Ionele CM; Ungureanu BS; Subtirelu MS · Healthcare (Basel, Switzerland) · 2023
    Non-randomized trial505 participantsEnergy forArginine
  8. Isolated but not combined ergogenic effects of caffeine and L-arginine during an isokinetic knee extension.
    Zart S; Brachtendorf M; Becker S; Fröhlich M · Frontiers in nutrition · 2024
    Randomized trial29 participantsEnergy forArginine
  9. L-Arginine but not L-glutamine likely increases exogenous carbohydrate oxidation during endurance exercise.
    Rowlands DS; Clarke J; Green JG; Shi X · European journal of applied physiology · 2012
    Randomized trial8 participantsEnergy forArginine
  10. Effect of L-arginine on energy metabolism, skeletal muscle and brown adipose tissue in South Asian and Europid prediabetic men: a randomised double-blinded crossover study.
    Boon MR; Hanssen MJW; Brans B; Hülsman CJM; Hoeks J; Nahon KJ; Bakker C; van Klinken JB; Havekes B; Schaart G; Jazet IM; Rensen PCN; van Marken Lichtenbelt WD · Diabetologia · 2019
    Randomized trial20 participantsEnergy forArginine
  11. The effect of L-arginine supplementation on maximal oxygen uptake: A systematic review and meta-analysis.
    Rezaei S; Gholamalizadeh M; Tabrizi R; Nowrouzi-Sohrabi P; Rastgoo S; Doaei S · Physiological reports · 2021
    Meta-analysis11 studies pooledFitness forArginine
  12. L-Arginine Enhances the Effects of Cardiac Rehabilitation on Physical Performance: New Insights for Managing Cardiovascular Patients During the COVID-19 Pandemic.
    Mone P; Izzo R; Marazzi G; Manzi MV; Gallo P; Campolongo G; Cacciotti L; Tartaglia D; Caminiti G; Varzideh F; Santulli G; Trimarco V · The Journal of pharmacology and experimental therapeutics · 2022
    Clinical trialFitness forArginine
  13. THE EFFECT OF A SINGLE ORAL DOSE OF L-ARGININE ON QUADRICEPS STRENGTH IN SMOKERS AND NON-SMOKERS: A NON-RANDOMIZED CLINICAL TRIAL.
    Radmilović G; Popović-Grle S; Matijević V · Acta clinica Croatica · 2025
    Non-randomized trial164 participantsFitness forArginine
  14. Efficacy of amino acids in sports nutrition- review of clinical evidences.
    Duttagupta S; Krishna Roy N; Dey G · Food research international (Ottawa, Ont.) · 2024
    Narrative reviewFitness forArginine
  15. Chronic L-arginine supplementation enhances endurance exercise tolerance in heart failure patients.
    Doutreleau S; Mettauer B; Piquard F; Rouyer O; Schaefer A; Lonsdorfer J; Geny B · International journal of sports medicine · 2006
    Non-randomized trialFitness forArginine