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  • Natural Factors L-Arginine 1000 mg, 180 Tablets, HIGH POTENCY, Supports Healthy Heart Function, Proudly Canadian
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Natural Factors L-Arginine 1000 mg, 180 Tablets, HIGH POTENCY, Supports Healthy Heart Function, Proudly Canadian

4.4 out of 5 stars 31 ratings
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  • CONDITIONALLY ESSENTIAL AMINO ACID: L-arginine is a conditionally essential amino acid, which means that although it can be manufactured by the body, the body may need more than it can produce on its own during times of illness, stress, and recovery from injury.
  • SUPPORTS A HEALTHY HEART: It may help support a modest improvement in exercise capacity in individuals with stable cardiovascular disease (CVD).
  • SUPPORTS PROTEIN SYNTHESIS: Natural Factors L-Arginine 1000 mg is a non-essential amino acid involved in protein synthesis.
  • IMPROVES BLOOD FLOW: L-arginine plays a critical role in the production of nitric oxide, a substance that relaxes blood vessels, helping to improve blood flow. A deficiency of L-arginine can disrupt many cellular functions in the body, including those of the blood vessels.
  • FREE FORM AMINO ACID: As a free-form amino acid, L-arginine is easier for the body to absorb and use than when consumed in the form of protein from food, such as dairy, meat, and fish. Available in two strengths, Natural Factors L-Arginine is pure, vegan, and free of preservatives, sweeteners, gluten, and GMOs.
  • THIRD PARTY TESTING - ISURA VERIFIED CLEAN: The ISURA seal is your assurance that this product is independently verified as clean and safe, and has been tested for up to 800 possible contaminants. This product is ISURA verified clean, one of the highest testing standards in the world.
  • VEGAN, NON-GMO, GLUTEN FREE, FORUMULATED & PACKAGED IN B.C.
  • NATURAL PRODUCT NUMBER (NPN): 80033897
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Important information

Ingredients

Medicinal Ingredients: Each tablet contains: L-arginine (hydrochloride) 1000 mg. Non-medicinal Ingredients: Microcrystalline cellulose, dibasic calcium phosphate dihydrate, hydroxypropylcellulose, stearic acid, coating (carbohydrate gum [cellulose], glycerin), vegetable grade magnesium stearate (lubricant), silica.

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Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product.

Product Description

Natural Factors NAC 600mg
Natural Factors L-Lysine 1000mg
Natural Factors L-Tyrosine 500 mg
Natural Factors L-Glutamine 1000 mg
Natural Factors L-Arginine 1000 mg
Natural Factors L-Tryptophan 220 mg
Customer Reviews
4.6 out of 5 stars 835
4.4 out of 5 stars 67
4.6 out of 5 stars 18
4.4 out of 5 stars 13
4.4 out of 5 stars 31
4.4 out of 5 stars 33
Size 180 Veg Caps 120 Tabs 120 Veg Caps 60 Veg Caps 180 Tabs 90 Veg Caps
Benefits Scavenges Free Radicals & Reduces Oxidative Stress. Aids in Respiratory Health. Helps Reduce the Recurrence, Severity, & Healing Time of Cold Sores Helps Decrease Cognitive Fatigue Resulting from Physically Stressful Situations Enhances Muscle Tissue Repair After Exercise Helps Support Healthy Heart Function Assists in the Building of Lean Muscle Mass when Combined with Regular Resistance Training
Key Ingredients NAC (N-Acetyl-L-Cysteine) L-Lysine (hydrochloride) L-Tyrosine L-Glutamine L-Arginine (hydrochloride) L-Tryptophan
Potency 600 mg 1000 mg 500 mg 1000 mg 1000 mg 220 mg
Gluten Free, Vegetarian, Non-GMO ✓ ✓ ✓ ✓ ✓ ✓
No Artificial Colours, Preservatives or Sweeteners ✓ ✓ ✓ ✓ ✓ ✓
Third Party Tested (ISURA) ✓ ✓ ✓ ✓ ✓ ✓
Canadian ✓ ✓ ✓ ✓ ✓ ✓

Product information

Technical Details

Manufacturer ‎Natural Factors
Place of Business ‎Natural Factors, Coquitlam BC, V3K 6Y2
Item model number ‎2856
Parcel Dimensions ‎14.4 x 7.3 x 7.2 cm; 800 g
ASIN ‎B0DKVXLY3N

Additional Information

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Natural Factors L-Arginine 1000 mg, 180 Tablets, HIGH POTENCY, Supports Healthy Heart Function, Proudly Canadian

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Product details

  • Parcel Dimensions ‏ : ‎ 14.4 x 7.3 x 7.2 cm; 800 g
  • Date First Available ‏ : ‎ Oct. 24 2024
  • Manufacturer ‏ : ‎ Natural Factors
  • Place of Business ‏ : ‎ Natural Factors, Coquitlam BC, V3K 6Y2
  • ASIN ‏ : ‎ B0DKVXLY3N
  • Item model number ‏ : ‎ 2856
  • Country of origin ‏ : ‎ Canada
  • 鶹 Rank: #8,688 in Health & Personal Care (See Top 100 in Health & Personal Care)
  • Customer Reviews:
    4.4 out of 5 stars 31 ratings

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Customer reviews

4.4 out of 5 stars
31 global ratings

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4 out of 5 stars
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This pill is HUGE. Babes, if you are here taking this for fertility- best of luck. I’ll be right there with you fighting for my life daily with this bad boy.
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Top reviews from Canada

  • ADIL MAKHLOUFI
    5.0 out of 5 stars GD kind
    Reviewed in Canada on June 30, 2025
    Verified Purchase
    Very good one
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  • Munchkin the Reviewer
    4.0 out of 5 stars Pretty Good Quality
    Reviewed in Canada on June 29, 2025
    Verified Purchase
    What’s Good: L-Arginine, 1000 mg per tablet, 180 tablets. Supports heart health, blood flow, and gym pumps. I’m into lifting and cardio, so this is my jam.

    Ingredients: Pure L-Arginine, no sketchy fillers. Non-GMO, vegan, Canadian-made. Natural Factors is legit, so I trust the quality.

    Effects: Been taking it a few weeks. Getting better gym endurance—veins pop during lifts, and I’m less gassed during HIIT. Heart benefits? Can’t test that, but I’m down with the science.

    Dosage: 1-3 tablets daily. I do one at breakfast, one pre-workout. Bottle lasts 2-6 months, depending on dose. Super solid value.

    Taste/Swallow: Tablets are a bit big but not awful. No taste, no weird burps. Way better than fishy supps.
    Price: ~$30-35 CAD for 180 tablets on 鶹.ca. Crazy good deal for high-potency L-Arginine compared to pricier brands.

    Packaging: Basic plastic bottle, does the job. Clear label, sealed tight. Fits easy in my supplement stash.

    User Vibes: 鶹 reviews are mostly hype—folks like it for workouts, blood pressure, and even “bedroom gains.” Some felt nothing, but no side effect complaints.

    Downsides: Tablets are kinda large. Takes a week or two to kick in. If you’re on BP meds, talk to a doc first.

    Vibe Check: 8.5/10. Dope for gym bros or heart health. Clean, affordable, just wish tablets were smaller.
    Helpful
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  • Roberto Herrera
    5.0 out of 5 stars Its good!
    Reviewed in Canada on February 28, 2025
    Verified Purchase
    Fast Delivery
    Helpful
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  • Doug
    3.0 out of 5 stars Tough to Swallow
    Reviewed in Canada on March 18, 2025
    Verified Purchase
    Tablet size is much too large for me. Capsules may be easier to swallow.
    One person found this helpful
    Helpful
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  • 鶹 Customer
    5.0 out of 5 stars Great
    Reviewed in Canada on March 9, 2025
    Verified Purchase
    It arrived on time and as described.
    Helpful
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  • 鶹 Customer
    5.0 out of 5 stars A good quality supplement that increases nitric oxide
    Reviewed in Canada on November 17, 2024
    鶹 Vine Customer Review of Free Product( What's this? )
    Pros:

    - L-arginine is commonly taken in order to increase nitric oxide in the body, which can enhance blood flow and improve workout performance. This supplement contains 1,000 mg of l-arginine per capsule, with a recommended dosage of 3-6 capsules per day. This is a lot of capsules but at least the bottle contains quite a large amount at 180 capsules, so it will still last you 30-60 days.

    - The capsules are a bit large but I found them pretty easy to swallow. I didn't notice any aftertaste and I didn't experience any negative side effects after taking them.

    - The bottle has an NPN number printed on it which means that it's properly licensed as a natural health product for the Canadian market. It also says it's formulated and packaged in Canada, and also tested for purity by Isura, a third party testing company.

    Cons:

    - None.

    Current title: Natural Factors L-Arginine 1000 mg, 180 Tablets, Supports Healthy Heart Function
    My rating system: 5 stars = performs as expected, 4 stars = small flaws, 3 stars = major flaws, 2 stars = barely usable, 1 star = trash
    Helpful
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  • Kenni
    4.0 out of 5 stars This pill is HUGE
    Reviewed in Canada on June 10, 2025
    Verified Purchase
    This pill is HUGE. Babes, if you are here taking this for fertility- best of luck. I’ll be right there with you fighting for my life daily with this bad boy.
    Customer image
    Kenni
    4.0 out of 5 stars
    This pill is HUGE

    Reviewed in Canada on June 10, 2025
    This pill is HUGE. Babes, if you are here taking this for fertility- best of luck. I’ll be right there with you fighting for my life daily with this bad boy.
    Images in this review
    Customer image
    One person found this helpful
    Helpful
     Report
  • Chris
    5.0 out of 5 stars Made in Canada, easy to swallow, no aftertaste, and a good value for 180 tablets
    Reviewed in Canada on November 15, 2024
    鶹 Vine Customer Review of Free Product( What's this? )
    I appreciate that these L-Arginine tablets are made in Canada; that's important to me. I also make sure the supplements I take are licensed, so I looked up this product in Health Canada's Licensed Natural Health Products Database (LNHPD) by the NPN shown on the product, 80033897, and these L-Arginine supplements are listed in the Health Canada database as of this review date, so this product is licensed.

    The capsules are white and on the larger side, but not significantly larger than any of the other supplements I already take. Swallowing one of these with some water was easy, but I wouldn't swallow it with any other tablets at the same time. There was no awful aftertaste after swallowing and digesting. The tablets are well-made and don't leave any chalky residue after handling.

    At the current price of about $35 for 180 tablets, these L-Arginine 1000mg tablets are about 30% cheaper than the other brand I had used recently, so these are a value for me at the current price.
    2 people found this helpful
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Disclaimer:While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read and follow labels, warnings, and directions before using or consuming a product. This product may not be right for you. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. 鶹.ca assumes no liability for inaccuracies or misstatements about products.