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L-Arginine Powder

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Hard Rhino

 Product Description

L-Arginine is a versatile amino acid serving as a precursor for the manufacturing of proteins, nitric oxide, urea, glutamate, and creatine in the body. Increased L-Arginine in the body may lead to an increase of Nitric Oxide (NO) production, which may also increase blood flow during exercise, allowing for muscles to perform longer under stress. The vasodilation effect of Nitric Oxide may provide a fuller and more satisfying pump during exercise.†

Nitric Oxide (NO) production puts the urea cycle into overdrive, allowing it to absorb more ammonia (composed of nitrogen molecules) produced by working muscles. Removal of ammonia from the brain is believed to have detoxification and neuroprotective qualities.†


Suggested Use:

back-how-to-use-500g-cropped.pngAs a dietary supplement, take 3000 mg (~1 tsp) 1-2 times daily with 16 ounces of water or suitable beverage. Taken once in the morning on an empty stomach and/or again one hour prior to workout for best results.


This product contains no Soy, Dairy, Dairy byproducts, Eggs, Fish, Shellfish, Wheat, Gluten, Tree Nuts, or Sesame Seeds.


This is a NON-GMO ingredient manufactured using organic starting ingredients.


Store in a cool, dry place. Re-seal zipper immediately after use to preserve freshness.


† These statements have not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure or prevent any diseases.


Keep out of the reach of children. Do not take this or any other supplement if under the age of 18, pregnant or nursing a baby, or if you have any known or suspected medical conditions and/or taking prescription drug(s) or OTC medication(s). Always consult with a qualified health physician before taking any new dietary supplement.

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 Product Reviews

Showing reviews 1-10 of 12 | Next

  1. great stuff

    Posted by Unknown on 28th Oct 2016

    Big difference during my workouts...I don't fatigue very much.

  2. Seems to be working

    Posted by Peter on 27th Sep 2016

    I bought this with Pine bark extract. I am 65 y.o. and do not get an erection without a female who is an active participant. After using this 3 or 4 times I am beginning to get partial erections while sleeping. I definitely feel more sexual desire. As far as getting a firm erection like I used to it is too soon to tell.

  3. Good product

    Posted by Unknown on 19th Aug 2016

    Good, affordable supplement to take... I mix it with protein, BCAA and tautlrine and take while I work out...big difference

  4. One of my main Amino Acids

    Posted by Tom S. on 10th Jun 2016

    I have not felt as good as strong or as young as I do now in a very long time.
    Certain blends of certain Amino Acids at certain times of day has changed my life.
    I have blood work to prove how well I feel its the blood work of someone in their 20's to early 30's and I will be 60 in less than a year with a long history of health issues which most are now gone and more muscle mass than I ever had in my entire life.
    Do I like Amino Acids no I love them, fantastic stuff.......

  5. L-Arginine rocks!

    Posted by Unknown on 18th Mar 2016

    helps with my workouts tremendously

  6. excellent.

    Posted by Les on 26th Feb 2016

    Excellent noticed a difference first day!

  7. AWEFUL taste but good product

    Posted by Unknown on 15th Dec 2015

    This stuff taste terrible!! But I've only used it for the past 3 days and thus far no complaints. It's hard to review product without having a full 20-30days of use for it. So if HardRhino really wants a true review they'll remind me in 20days.

  8. Great Product!

    Posted by Sean Fairley on 28th Aug 2015

    Never supp'd raw Arginine pre-workout. Whaow! A very noticeable change with my workout today, in a good way. Nice pump, increased blood flow through my veins, and I wanted to keep going... so I did ;) It's not magic of course, but this stuff really shows itself, during and post workout.

  9. helps with workouts

    Posted by Randy on 17th Aug 2015

    gives you the added push to any workout so you can accomplish your goal

  10. great quality!

    Posted by Brian H on 7th Oct 2014

    This product is really helping me sleep better. Take 5g before bed. Takes a couple of days to kick in.

Showing reviews 1-10 of 12 | Next

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