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NOW Foods NOW L-Arginine 1000mg
SPECIMEN #NOW-L-AR
AMINO_ACIDNOW Foods

NOW L-Arginine 1000mg

Nitric oxide support for blood flow and exercise recovery.. L-Arginine needs much higher doses to be effective for blood flow. Most clinical studies use 5 to 6 grams, so a single 1000mg pill is just a fraction of what you actually need. You'll likely need to swallow half the bottle to see the results you're looking for.

6.3/10
GOOD

Reliable brand and pure ingredient, but the dose is far too low for real performance gains.

1 ingredientCapsules50 servings
We'd look at alternatives
Evidence
9.0
Dosing
1.7
SynergyN/A (single ingredient)
Analyze My Stack
WhenAny Time

It can be taken pre-workout for a pump, but it works best when consistent levels are maintained.

FoodEmpty stomach

Amino acids like Arginine compete with protein from food for absorption.

SafetyAll clear
ResearchStrong evidence

Arginine is well-studied for nitric oxide production, but the evidence favors L-Citrulline for better results.

What We Like

  • Trusted GMP manufacturer
  • Clean single-ingredient profile
  • Highly affordable

Watch Out For

  • Significantly underdosed for performance
  • Poor bioavailability compared to Citrulline
  • Requires taking 5 to 6 pills for clinical effect

What We Analyzed

NOW L-Arginine 1000mg Supplement Facts

Verified Supplement Facts

Every dose checked against clinical research

We analyzed the actual supplement facts panel for this product. Every ingredient dose below was cross-referenced with published clinical trials to determine if it matches what studies actually use.

4 ingredients analyzed1 underdosed

Source: Official product page

Ingredient Breakdown

1 underdosed
Clinical Adequate Underdosed Overdosed|Bar = % of clinical dose
IngredientDoseStatusvs. Clinical
L-Arginine8.0
1000mgUNDERDOSED
17%
1000mg

of 6000mg

UNDERDOSED
17%
In our database (click to learn more) Not yet reviewed
Other Ingredients(inactive)

Hypromellose (cellulose capsule), Stearic Acid (vegetable source), Silicon Dioxide

Our Analysis

Best For

People looking for very mild circulatory support or those on a strict budget.

Skip This If

Anyone with a history of cold sores or herpes as Arginine can trigger outbreaks.

Time to Feel

30-60 minutes

Value

Budget-friendly

How to take: Take daily

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