21st Century, 21st Century, L-Arginine, 1,000 mg, 100 Tablets

Name: 21st Century, L-Arginine, 1,000 mg, 100 Tablets
Brand: 21st Century
Rating: 4.7 (9725 reviews)

21st Century, L-Arginine, 1,000 mg, 100 Tablets — product photo 1

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Scored for

Outcome alternatives

21st Century100 count • 100 servingsAvailable now$12.34$0.12 / serving4.7 · 9,725 ratings33 / day

5−82 pts from leader

#1563 of 3189 ranked for vascular functionLeader · California Gold Nutrition, California Gold Nutrition, Resveratrol Complex with Grape Seed Extract, Red Wine Extract, and trans-Resveratrol, 250 Veggie Capsules — 87

Why this ranks #1563 for vascular function

Evidence fitL-Arginine is the strongest evidence signal for this outcome.
Dose fitL-Arginine at 1000 mg is higher than the studied 3-9 g window.
Price / serving$0.12 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

Trade-offsDose fit is the weak spot on this listValue for money trails the rest of this list

The numbers · Vascular function

What's inside

1000 mgAbove rangehigher than the studied 3-9 g window

Retailer links may be affiliate links. Rankings and placement are not paid placement.

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Market trends

Price and daily demand history · last 10 crawls

$12.99+0% vs avg

Jul 18Jul 5

33 / day-45% vs avg

Jul 18Jul 5

Rating history

Rating quality and social-proof history · last 10 crawls

4.70 / 5+0% vs avg

Jul 18Jul 5

9,725+6% vs avg

Jul 18Jul 5

By outcome

vs overall leader for each ranked outcome — open any outcome to see its ranked alternatives.

6 outcomes

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Vascular functionScoring−82 pts from leader

Product 5Leader 87

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Nitric oxide bioavailability−83 pts from leader

Product 2Leader 85

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Erectile function−82 pts from leader

Product 2Leader 84

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Blood pressure−87 pts from leader

Product 2Leader 89

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Insulin sensitivity−85 pts from leader

Product 0Leader 85

Showing the top 5 of 6 ranked outcomes.

What buyers report

Review Intelligence

4.7/ 5.0 · 9,725 reviews

Neutral read

“Customers appreciate the high quality and value for money of this supplement, highlighting its effectiveness in supporting workouts and overall health. Many users report improved blood circulation, increased energy levels, and better vascular function. The product is praised for its role in muscle growth, stamina enhancement, and cardiovascular health. The tablet form is easy to swallow, and the 100-tablet quantity offers good value. Some users specifically mention benefits for managing cold sores with L-lysine. Overall satisfaction is high with positive feedback on taste, packaging, and delivery.”

Highlights

Good taste

Blood circulation

Increased stamina

Improves health

Improved energy

Muscle pump

Great results

Increased athletic performance

Observations

Great source

No difference

Concerns

No concerns surfaced yet