L-Arginine is an amino acid, a building block of proteins, naturally found in foods such as red meat, poultry, fish, and dairy products. It plays a crucial role in the body by being a precursor to nitric oxide, a compound that helps relax blood vessels and improve circulation. This property has made L-Arginine a subject of interest for its potential cardiovascular benefits, including improved blood flow and reduced blood pressure. Some studies suggest it may support exercise performance by enhan

How many studies on L-Arginine are available?

NutriVouch references 344 human studies on L-Arginine, all peer-reviewed and indexed on PubMed.

Is L-Arginine effective for Circulation?

For Circulation, L-Arginine has an effectiveness score of 5/10 — moderate evidence — works in some populations. Based on 17 relevant studies.

Is L-Arginine effective for Exercise Performance?

For Exercise Performance, L-Arginine has an effectiveness score of 4/10 — weak or limited clinical evidence. Based on 12 relevant studies.

Is L-Arginine effective for Endurance?

For Endurance, L-Arginine has an effectiveness score of 4/10 — weak or limited clinical evidence. Based on 10 relevant studies.

Is L-Arginine effective for Wound Healing?

For Wound Healing, L-Arginine has an effectiveness score of 4/10 — weak or limited clinical evidence. Based on 27 relevant studies.

Is L-Arginine effective for Heart Health?

For Heart Health, L-Arginine has an effectiveness score of 4/10 — weak or limited clinical evidence. Based on 21 relevant studies.

Confidence level

Strong evidence

344 studies

L-Arginine

Absorption

✦Best absorbed on an empty stomach. Avoid taking with other amino acids to prevent competition for absorption.

Daily Dose

⚖

Common dose: 3–6 grams daily

RDA: No official RDA established

Upper limit: Not established

Best form: L-arginine hydrochloride, L-arginine free base

Timing: Take on an empty stomach for better absorption.

High doses may cause gastrointestinal discomfort. Consult a healthcare provider before use, especially if you have cardiovascular conditions.

Effects

🫀 Circulation

5.017 studies›

🏃 Exercise Performance

Food Sources

Turkey breast16g per 100g
Chicken breast9g per 100g
Pumpkin seeds6g per 100g
Soybeans4.6g per 100g
Peanuts3.5g per 100g