Key Benefits 

• With magnesium to help reduce tiredness and fatigue, and support normal muscle function.

• Sustained release formula helps maintain steady L-arginine levels for ongoing support.

Discover a supplement designed for your active lifestyle. L-Arginine - Sustained Release from Thorne delivers a steady supply of this conditionally essential amino acid, a key building block of protein. Each serving provides 1000 mg (1g) of L-arginine in a highly absorbable form, combined with Thorne’s Time-Sorb® complex for gradual release throughout the day. Magnesium in this formula contributes to the reduction of tiredness and fatigue, and supports normal muscle function—so you can keep moving, whatever your day brings. Choose L-Arginine - Sustained Release for daily support that fits seamlessly into your routine.

What sets Thorne apart is its third-party testing and certification, ensuring that the contents of the package match the label and are free from unsafe levels of contaminants like heavy metals, pesticides, and microorganisms. This commitment to purity and accuracy gives you peace of mind knowing that what you’re taking is safe and effective .

Thorne sets the standard for excellence in the supplement industry. Recommended by over 100 professional sports teams and U.S. National Teams, Thorne offers a curated bundle of clean, science-backed supplements and treats designed complement a healthy lifestyle. With more than 30 years of dedication to quality, Thorne's commitment to purity and potency begins with sustainably sourced ingredients and rigorous testing. Every supplement undergoes four rounds of testing to ensure optimal absorption, safety, and efficacy, making Thorne the trusted choice for both health-conscious individuals and professionals.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

L-Arginine, L-Leucine, High And Low Viscosity Hydroxypropyl Methylcellulose, Calcium Laurate & Magnesium Citrate ((Time-Sorb®), Hypromellose (Derived from Cellulose) Capsule, Anti-Caking Agent (Silicon Dioxide)

Take 2 capsules two times daily or as recommended by your health professional.

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 professional before using this product.

INTERACTIONS:
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. L-arginine supplementation is contraindicated in a patient with hepatocellular carcinoma.

Additional Information:

Food supplements and foods sold by Healf should not be used as a substitute for a varied, balanced diet and healthy lifestyle.

If you are pregnant, breastfeeding, have a medical condition, or are taking any medications, please consult with a healthcare professional before use. Use products only if the seal is intact. Store in a cool, dry place, out of the reach of young children. Do not exceed the recommended daily intake.

We make every effort to ensure that product information on our website is accurate and up to date, but packaging and ingredients may occasionally vary from images shown on site. Please refer to the product label and contact Healf before use if you have any questions regarding your specific allergies or intolerances.