SKU: 84095520190

Natural Factors L-Arginine 500mg - 90 Capsules

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Description

Natural Factors L-Arginine 500mg - 90 CapsulesArginine is a conditional amino acid, which means it can be manufactured by the body. However, in times of illness and stress, more may be needed than the body can produce. Arginine is found in foods such as dairy, meat, and fish. As a dietary supplement, free form L arginine is easier for the body to utilize, as free form amino acids are already singular molecules that dont require digestion. Arginine supports healthy heart function, strengthens the

Arginine is a conditional amino acid, which means it can be manufactured by the body. However, in times of illness and stress, more may be needed than the body can produce. Arginine is found in foods such as dairy, meat, and fish. As a dietary supplement, “free form” L-arginine is easier for the body to utilize, as free form amino acids are already singular molecules that don’t require digestion.

Arginine supports healthy heart function, strengthens the immune system, improves healing, and enhances the power, strength, intensity, and recovery of muscles. It also increases the production of nitric oxide, a substance that dilates blood vessels, aids in circulation, lowers blood pressure, and helps prevent atherosclerosis. As a result, arginine is able to protect the cardiovascular system against atherosclerosis, high blood pressure, blood clots, high cholesterol, and other conditions.

Arginine stimulates protein synthesis and increases the force and power of skeletal muscle, which helps athletes and bodybuilders increase strength, optimize lean body mass, increase performance, and promote recovery. High intensity training weakens the immune system and can cause inflammation and injury. Arginine counteracts these effects by enhancing immune function, decreasing inflammation, and improving wound healing. It’s especially important for athletes who train intensively, as they require extra support during training and a shorter recovery period.

Main selling features

500 mg tablets provide easily absorbed free form L-arginine

Improves circulation by improving blood flow

Supports performance, healing, and immune system of athletes and bodybuilders

For use by those with stable a cardiovascular system

Vegetarian capsules

How it works

Arginine is an amino acid that is involved in protein production, wound healing, and the production of nitric oxide and other important compounds. Nitric oxide is a molecule that is involved in many physiological processes, especially in the cardiovascular system. Many diseases are associated with low production of nitric oxide including diabetes, heart disease, high cholesterol, high blood pressure, obesity, and aging. Nitric oxide dilates blood vessels, increases blood flow, improves functioning of the endothelium, and inhibits platelet aggregation and smooth muscle proliferation. These effects help maintain normal cardiovascular function and blood pressure, and protect against oxidative damage. 

In skeletal muscle, arginine causes the release of nitric oxide, prostaglandins, and other powerful compounds that increase muscle force and power, stimulate protein synthesis, maintain glucose homeostasis, and increase blood flow to muscles. 

Arginine stimulates the release of hormones from the pituitary and adrenal glands, including growth hormone, insulin, and glucagon, which may help bodybuilders increase muscle strength and lean body mass. Arginine promotes protein synthesis, improves collagen deposition, improves wound strength, decreases inflammation, and strengthens the immune system, making it an important supplement for wound healing.

Ingredients

Medicinal ingredients

Each capsule contains:

L-arginine (hydrochloride)

500 mg

Non-medicinal ingredients

Rice starch, vegetarian capsule (carbohydrate gum [cellulose], purified water), vegetable grade magnesium stearate (lubricant).

Suggested Usage

Recommended Adult Dose: 4 capsules 3 times daily with meals or as directed by a health care practitioner.  If you suffer from a cardiovascular disease, consult a health care practitioner for use beyond 6 weeks. 

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SKU: 84095520190

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catherine valdez
Charlottesville, US
★★★★★ 5
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Flavor Name: Extra Strong, Size: 3.4 Fl Oz
It’s supposedly good for cancer and other things so will see
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Reviewed in the United States on May 13, 2026
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Kayci Frederick
Massapequa, US
★★★★★ 5
Great vegan D3 with K2 combination
Size: 60 Count (Pack of 1)
Finally found something that combines vegan D3 with K2 in an organic form. The 5000IU dosage is potent and seems effective for bone support. I appreciate that it's plant-based and has high absorption, which feels like a quality supplement. The packaging is convenient, making it easy to take daily. Overall, a reliable product for maintaining bone health.
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Reviewed in the United States on December 18, 2025
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Anna
Phoenix, US
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Good
Size: 60 Count (Pack of 1)
Great Supplement for Bone and Immune Health! I’ve been taking NatureWise Vitamin D3 + K2 for a few months now, and I can really feel the difference. I chose this brand because it combines D3 and K2 — a perfect pair for supporting calcium absorption and overall bone health. The softgels are small, easy to swallow, and don’t have any aftertaste. I also appreciate that they use non-GMO ingredients and cold-pressed olive oil as the carrier, which helps with absorption.
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Reviewed in the United States on November 12, 2025
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S. A. Coppens
Lake Worth, US
★★★★★ 5
Returning Customer
Size: 60 Count (Pack of 1)
I think this is a really good buy. Good quality. Vitamins are costly. Happy with these.
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Reviewed in the United States on May 27, 2026
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Sonya Gable-Wilson
Alexandria, US
★★★★★ 5
This D3 works really well
Size: 60 Count (Pack of 1)
The NatureWise Vegan Vitamin D3 + K2 supplement combines premium ingredients and supports my immune system effectively. I appreciate the organic cold-pressed olive oil used for high absorption. The capsules are easy to swallow, and I feel confident about the non-GMO quality. It's become a reliable part of my daily health routine.
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Reviewed in the United States on October 20, 2025

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