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D-Aspartic Acid (DAA) Powder

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Hard Rhino

 Product Description

Hard Rhino D-Aspartic Acid (unflavored) is a pure form powder with no excipients or fillers, available in multiple sizes.

D-Aspartic Acid is one of the enantiomers of the amino acid known as Aspartate, where the common dietary enantiomer is L-Aspartate. L-Aspartate is a non-essential amino acid and can be incorporated into protein structures, although D-Aspartate is not commonly associated with protein structures. D-Aspartate has been found to be a constituent of human cartilage, enamel, and can be accumulated in the brain as well as being a constituent of red blood cell membranes.†

D-Aspartic Acid (DAA) is suggested to be a regulator of testosterone synthesis and may act on a stimulatory receptor (N-methyl-D-aspartate). D-Aspartic Acid shows promise in increasing nitric oxide levels. Continuous supplementation of D-Aspartic Acid may only provide temporary increases in test levels for healthy men. Cycling of D-Aspartic Acid is recommended and the most effective means of use.

Suggested Use: back-how-to-use-500g-cropped.png

As a dietary supplement, take 3 grams (~1/2 tbsp) mixed with 16 ounces of water or suitable beverage and drink on an empty stomach. Taken once in the morning and again in the evening for maximum 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


    Posted by Asa Barnes on 10th Jan 2017

    My recovery from heavy training has improved dramatically. Very little soreness after a heavy session. Quick recovery. I would have to say this product is for real. And the research seems to back it up. Ive recommended it to a few associates.

  2. works as promised

    Posted by Unknown on 22nd Apr 2016

    Works great, I mix it in with my morning coffee or orange juice. I notice an increase in "drive" almost immediately

  3. Excellent amino for reproductive health

    Posted by steelwarrior on 22nd Jun 2015

    Was advised by a physician that by adding DAA at 2grams daily into my diet that it would aid in low sperm count and mobility and was checked 3 weeks later and my count was normal once again..excellent quality of product.

  4. satisfied

    Posted by Unknown on 9th Mar 2015

    After a week of use (1/2 teaspoon leveled 2 times a day) I will say it works, After years of Testosterone supplements (injected) for a career of mixed martial arts, I have some idea about the levels of test needed to really get a big boost in aggression and performance.
    Thus I would compare use of this product to 1/8th of a 250ml testosterone injection in effect.
    If you never used steroids before this product will be amazing (if your over 40) if you have used steroids before this product is... noticeable but not anything close to the real gear.
    as for the estrogen effects of it... firstly your body makes estrogen out of unused testosterone. estrogen is not manufactured in your body from scratch (first fact) so the with even a 40% increase in test levels from this product you can very easily burn off (use in muscular development) that extra test with little remaining to convert to hated estrogen.
    therefore I do not think any anti-estrogens are needed for this very small rise in test levels, remember that steroids boost your test levels several hundred or even thousand times more than normal and anti estrogen is only needed at the end of a cycle and only to get your body back to normal test levels, so a 40% increase is really not much and it wont build big muscles like steroids do, but it will make you more horny and a bit more aggressive, use that aggression to lift more weights and you will build more muscle but only at your normal growth rate.
    so ending I will say its a good product for old bastards like me who don't want to loose years of trained muscle mass with old age.
    its not steroids.
    you wont blow up and dominate the octagon with this product.
    but you will benefit from it if your over 40.
    and stop worrying about estrogen effects from it, just work out hard every day and you will be fine.
    also note that alcohol (even as little as one beer a day) will contribute to far FAR greater testosterone conversation (in to estrogen) than a 40% test increase will. avoid the drink and you will avoid the man boobs!

  5. Great with Citruline

    Posted by Jorge on 30th Oct 2014

    DAA is essential when you're taking Citruline to produce NO. I didn't know this and wasn't taking it. Have noticed a huge difference in my workouts since adding DAA to my preworkout concoction. Definitely recommend taking along with citruline and L arginine.

  6. simply best product

    Posted by denis bozek on 29th Sep 2014

    This DAA is the best out of all other ones I tried . It makes me get too HORNY though lol! Seriously it's good I would recommend it and I like the unflavored taste, because it taste like lemon lol, doesn't desolve well but that doesn't matter still is great! Thank you hard rhino

  7. YES this does WORK

    Posted by Dex on 23rd Jun 2014

    Not to get too graphic here (Ladies you may want to close your eyes when reading further) but my balls are hanging much heavier that the nut sack skin on the upper portion is starting to wrinkle from the additional weight that my balls have gained since taking 4-5g of DAA 2 and a half weeks ago.
    I can actually contract my balls to go up and down bouncing easily (Something that I have had difficulty in the past to do).
    I am blowing much more of that white stuff to the point that it actually shoots out strongly about 5 or 5 times and the erection is stronger.
    I am taking this with Agmatine (3g at nighttime) to boost LH and GH and I definitely feel these chemicals complimenting each other big time.
    This stuff is SERIOUSLY underrated.

  8. We will wait and see if over time it helps with T levels

    Posted by Unknown on 19th Jun 2014

    Relatively tasteless with coconut milk, and for the price it can't be beat. I like this brand and I will be sticking with Hard Rhino.

  9. Really good

    Posted by Unknown on 13th Apr 2013

    Works very well for men

  10. Recommend to any weightlifters

    Posted by HRT on 19th Mar 2013

    Excellent product. Safe, cheap, and effective. Takes about a week or so to really feel it, run for 6-8 weeks for best results. DAA really shines when taken along with a (non-prescription) aromatase inhibitor, e.g., Triazole, 6-Bromo, ect. I recommend taking either of those with DAA (3 grams/day) for any weight lifting guy who wants to naturally elevate his testosterone in order to get significant strength and mass gains, and lean out and have increased libido. The benefits of mild prohormones/steroids without the risk. Make sure to eat more food or you will lean out. No regrets at all, I am already preparing for my next cycle. I got two of my gym buddies to try DAA after I had been on it for awhile and they love it too.

    I am only 24 so my Test. is still relatively high anyway, but these natural T-boosters really take it to the next level, strength went up a lot! The only downside is that you may feel slightly more depressed at times, but not everyone reports this. Changing the time when you take your dose (3.0 grams per day) or splitting your dose into two 1.5 gram servings may help.

Showing reviews 1-10 of 12 | Next

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