Thorne Research

L-Arginine – Sustained Release (formerly Perfusia-SR)

$44.00

SIZE: 120 Capsules

*Free shipping applies to orders shipped within the Lower 48 States.


Free shipping on orders over $99.

The Promise

Product identity, formulation, and quality Sustained-release L‑Arginine in a time-release matrix

L‑Arginine — 1 g per two‑capsule serving — formulated with Thorne’s Time‑Sorb® sustained‑release matrix and pharmaceutical excipients.

Identity

L‑Arginine — amino acid precursor to nitric oxide; product formerly marketed as Perfusia‑SR®.

Principal ingredient & amount

L‑Arginine complexed with Time‑Sorb®; 1 g L‑Arginine per serving (two capsules).

Formulation & delivery

Time‑Sorb® sustained‑release matrix (hydroxypropyl methylcellulose, calcium laurate, magnesium citrate) for gradual arginine release.

Dietary & quality facts

Hypromellose capsule; other excipients: leucine, silicon dioxide; Daily Value not established.

Why It Works

How this formulation is distinct Concrete formulation details and supported physiological role

Features measured ingredient amounts, a patented time‑release system, and the documented precursor role of L‑Arginine.

01

Measured dose

Each suggested serving (two capsules) delivers 1 g of L‑Arginine.

02

Time‑release matrix

L‑Arginine is complexed with Time‑Sorb® (high/low viscosity HPMC, calcium laurate, magnesium citrate) to slow release over several hours.

03

Physiological role

L‑Arginine is the body’s primary precursor to nitric oxide, which signals arterial smooth muscle to relax.

04

Blood‑flow and pressure context

Designed to support healthy circulation and help maintain blood pressure already in the normal range when taken as directed.*

Reviews

Customer Reviews

Your Journey

Using this product safely and effectively Serving, format, precautions, and practitioner considerations

Follow labeled directions; observe contraindications and consult your health‑care practitioner when indicated.

Serving

Suggested use

Take 2 capsules two times daily or as recommended by your health‑care practitioner. Serving size: two capsules; 60 servings per container.

Format & composition

Capsule format & excipients

Hypromellose (cellulose‑derived) capsule containing L‑Arginine complexed with Time‑Sorb®; other ingredients include leucine and silicon dioxide.

Pregnancy & practitioner advice

Consult before use if pregnant

If pregnant, consult your health‑care practitioner before using this product.

Contraindications & interactions

Allergy, cardiac and herpes cautions

Contraindicated with a history of hypersensitivity to any ingredient. L‑arginine is contraindicated after a myocardial infarction. Individuals with known herpes infection should not take L‑arginine without also taking lysine.

Product education

L-Arginine – Sustained Release: A Formula for Nitric Oxide and Blood Flow

Thorne’s L-Arginine – Sustained Release, formerly known as Perfusia-SR®, is a high-quality amino acid supplement designed to support cardiovascular health and optimal blood flow. L-arginine is the body’s primary precursor to nitric oxide, a crucial molecule that helps blood vessels relax and dilate. This advanced formula utilizes a proprietary time-release matrix (Time-Sorb®) to release L-arginine gradually, ensuring a sustained benefit for circulation and vascular health throughout the day.*

How It Works: The Time-Sorb® Advantage

Standard L-arginine is metabolized very quickly by the body. This formula is designed to provide a more lasting effect.

Promoting Healthy Circulation
The key ingredient, L-Arginine, is converted in the body into nitric oxide. Nitric oxide signals the smooth muscles of the arteries to relax, which promotes healthy circulation and helps to maintain blood pressure already in the normal range. In addition, healthy blood flow is essential for delivering oxygen and nutrients to every part of the body, supporting everything from exercise performance to male reproductive health.*

Sustained Release for All-Day Support
The patented Time-Sorb® delivery system complexes the L-arginine with a time-release matrix. This allows it to be released slowly over several hours. As a result, it maintains a more optimal and consistent level in the bloodstream with twice-daily use. This makes it a superior choice for long-term cardiovascular and circulatory support.*

  • Supports healthy blood flow and circulation to the heart and extremities*
  • Promotes the body’s natural production of nitric oxide*
  • Features a sustained-release formula for lasting, all-day benefit*
  • Helps maintain blood pressure already in the normal range*
  • Supports exercise capacity and male cardiovascular function*

Supplement record

Review serving details and ingredients for this product.

Supplement Facts:
Suggested Use: Take 2 capsules two times daily or as recommended by your health-care practitioner.
Serving Size: Two Capsules
Servings Per Container: 60
Ingredient Amount %DV
L-Arginine† 1 g **
Other ingredients: High and low viscosity hydroxypropyl methylcellulose, Calcium Laurate and Magnesium Citrate (Time-Sorb®†), Hypromellose (derived from cellulose) capsule, Leucine, Silicon Dioxide.
†L-Arginine complexed with Time-Sorb®, a time-release matrix.
**Daily Value (DV) not established.
ALLERGY WARNING
This product is contraindicated in an individual with a history of hypersensitivity to any of its ingredients.
PREGNANCY
If pregnant, consult your health-care practitioner before using this product.
INTERACTIONS
L-arginine supplementation is contraindicated in a patient with a history of a myocardial infarction. Individuals with a known herpes infection should not take L-arginine without also taking lysine, as L-arginine alone has been noted to cause herpes eruptions in susceptible individuals.