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L-Ornithine Powder

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In stock

Price From: FROM $12.96

Ships Monday, July 22 if ordered in the next 2 days, 18 hours and 8 minutes!

L-Ornithine Powder


  • Pure powder
  • Encourages healthy metabolism
  • Sports performance
  • Taste

  • Mixability

Ornithine is a nonessential, nonprotein amino acid that is created when arginine is broken down during the Krebs Cycle. Studies indicate that supplementation may lead to more efficient energy use, creatine production and increased physical endurance.


Serving Size & Timing

This supplement should be taken in servings of 800mg two times per day.

Nutritional Information

Supplement Facts

Serving size: 800 milligrams
Serving per container: *
Amount Per Serving % Daily Value**
L-Ornithine 800mg *
* Daily Value not established.
** Based on 2,000 calorie diet


Sugar, soy, dairy, yeast, gluten, corn and additives.

As a dietary supplement, take 800mg (rounded 1/4tsp) twice a day, or as directed by physician.

US Standard Measuring Spoons
Spoon Size(level) milligrams
1/8 teaspoon 325
1/4 teaspoon 651
1/2 teaspoon 1303



This supplement contains no fillers of any kind.


As long as suggested serving sizes are adhered to, this supplement should be safe. However, taking more than recommended may result in gastrointestinal pains. Women who are pregnant or nursing should not take this supplement, nor should anyone that has ever been diagnosed with schizophrenia.


This supplement is more soluble in hot water and has a bit of a sour flavor. It should be stored in an area that is free from light, heat and moisture.

California residents: Click here for Proposition 65 warning.

Customer Reviews

Less fatigued
I noticed right away I feel less fatigued during workouts. I can push out more reps- I'm hoping to get growth hormone benefits as well, this is something I was unaware of but very excited about. Good product for sure. *

On 4/11/2019 taylor said...

great product and pricing
I find myself more and more often just going straight to bulk supplements for my products needs, competitive pricing, great products and substantial variety always in stock.*

On 8/23/2018 jorge said...

For wound healing
I read in a paper how ornithine, when taken to 10% of daily protein intake, along with collagen helps wounds heal quickly in rats even without sleep. This has been my observation, so I think this product is really good! My wounds are healing a lot faster since I started taking this.*

On 8/10/2018 huiling said...

Ornithine Powder for developing lean muscle mass
I'm in my 60's and I use L-ornithine with L-arginine and the BCAAs with weight training for developing and maintaining lean muscle mass. I mix all three in water with apple cider vinegar to kill the amino acid taste and drink it before and during my gym workouts. You can get all three amino acids in whey protein, but whey protein has to be digested and broken down before the body can absorb and use the individual amino acids. The amino acid powders in water can be more quickly absorbed by your body and used more quickly during and after an intense gym workout. My recovery time is 24 hours and I have no trouble hitting the gym 5 or 6 days a week. *

On 6/27/2018 Allen said...

Great for Sleep
I love it for sleep. *

On 6/14/2018 ERIK said...

I feel better when waking up
I'm in my 40's, and have used Ornithine (sometimes paired with Arginine) in the past. But it can be hard to find, and expensive to get a substantial dose. Problem solved with Bulk Supplements! Note: To get a bump in HGH release when sleeping for the night, you want to take this at least 2 hours after your last meal. The theory is that Ornithine can coax your pituitary to release more HGH, but only if other amino acids are not "competing". Also, take with a full glass of water.

In short, I definitely feel more awake and energized when it's time to get up. I don't think this a placebo effect, because I have tried other products. So 2 thumbs up! Best price, quantity and quality that I have ever found. I will be ordering more of this product and others from Bulk Supplements.*

On 11/16/2017 David said...

Boost T Levels
When mixed with L Arginine in 100% fruit juice it boosts T levels over time when taken consistently. It works!!*

On 5/25/2017 Eugene said...

Sleeping like a baby
It's a little too soon to tell how it's helping with my recovery time, but I can say that I have had better sleep since incorporating this into my regimen. *

On 5/8/2017 Nicole said...

L-Ornithine HCL
I got a sample package of this product and decided to purchase more of it to incorporate it into my regimen.

I take this product to increase speed of recovery as well as release higher levels of GH. This product belongs in anyone's mix who is trying to stop aging.*

On 4/19/2017 Jeff said...

Used for sleep
I take this before going to bed at night with a protein shake. Objectively seems to help get deep, relaxed sleep. *

On 9/22/2016 Erik said...

i have not used this product long enough to form an opinion to its performance *

On 9/13/2016 Ronald said...

Ornithine has boosted my sprint performance and reduced fatigue more than any other supplement
The following is a list of clinical trials, most double-blinded and placebo-controlled, recorded at the National Medical Library, MEDLINE, as abstracted by GreenMedInfo for ornithine:

1. Acetyl-l-carnitine and Ornithine may help to facilitate night time growth hormone release.
2. Higher levels of omega 3 fatty acids and ornithine in plasma are associated with significantly lower incidence of renal transplant rejection.
3. L-ornithine has an antifatigue effect by increasing the efficiency of energy consumption and promoting the excretion of ammonia.
4. L-ornithine-L-aspartate infusions are therapeutic in patients with cirrhosis, elevated ammonia levels and hepatic encephalopathy.
5. Oral L-ornithine-L-aspartate is therapeutic in cirrhotic patients with hyperammonemic hepatic encephalopathy.
6. Ornithine supplementation enhances wound healing in rats.

Stacks Updated 9/2/16:

The morning pre-workout stack (all BulkSupplements products at a daily cost of $1.04) that I drink thirty minutes before running three 50-second sprints is as follows:

1. Magnesium Citrate, 1.9 gram (0.285 gram elemental magnesium)
2. Potassium Citrate, 1 gram (0.36 gram elemental potassium)
3. Zinc Gluconate, 0.3462 gram (0.045 gram elemental zinc)
4. Ascorbic Acid USP, 8 grams
5. L-Lysine HCL, 1.25 gram
6. L-Proline, 0.4 gram
7. L-Serine, 0.5 gram
8. L-Ornithine HCL, 0.8 gram
9. N-Acetyl L-Cysteine USP (NAC), 0.9 gram
10. N-N-Dimethylglycine HCL (DMG), Vitamin B15, 0.5 gram
11. Methyl-Sulfonyl-Methane USP (MSM), 3 grams
12. Milk Thistle 80% Silymarin, 0.25 gram
13. Thiamine HCL, 0.1372 gram
14. Riboflavin, Vitamin B2 USP, 0.05 gram
15. Niacin, Vitamin B3 USP, 0.925 gram
16. Calcium Pantothenate, Vitamin B5, 92% Pantothenate, 8% calcium, 0.4326 gram
17. Pyridoxine HCL, 82% Vitamin B6, 0.2784 gram
18. Biotin 1%, Vitamin B7 in 99% DiCalcium Phosphate, 0.5 gram (5000 mcg biotin)
19. PABA, Para Aminobenzoic Acid Vitamin B10, 0.5 gram
20. L-Carnitine, Vitamin B20, 0.6 gram
21. Acetyl-L-Carnitine (ALCAR), Vitamin B20 (acetylated), 0.6 gram
22. Alpha Lipoic Acid USP, 0.5875 gram
23. L-Theanine USP, 0.6 gram
24. Vitamin A Palmitate (Retinyl Palmitate) (25000 IU), 0.1 gram
25. L-Citrulline DL-Malate (2:1), 0.5 gram
26. L-Arginine, 1.125 gram
27. Beetroot Extract, 1.75 gram
28. L-Taurine, 2 grams
29. N-Acetyl L-Tyrosine USP (NALT), 0.8 gram
30. L-Glutamine USP after exercise only, 2 grams
31. Green Coffee Bean, 95% caffeine, 0.3 gram
32. Creatine Monohydrate, 3 grams
33. Fenugreek Powder, 2 grams
34. Green Tea Extract, 50% EGCG, 0.25 gram
35. Rhodiola Rosea 3% Salidrosides, 1% Rosavins, 0.2 gram
36. Rutin USP, 0.1666 gram
37. DHEA (Dehydroepiandrosterone) Powder, 0.025 gram
38. Betaine HCL, 0.8 gram*

On 9/2/2016 Stephen said...

Kick Start
Like a Harley. This L- ornithine is a kickstart to my daily L Arginine and Lysine regiment...... *

On 8/19/2016 Timothy said...

I use this product after my daily workout. The product mixes very well with milk. The shipping was fast and the quality of the product is great. I have not yet seen results from this product but I am hoping to see it soon!*

On 7/10/2016 Leslie said...

Great after a workout
The ornithine powder is great after a daily workout. I mix it in with my milk so I don't taste the flavor! I haven't seen the results yet but hopefully I will soon.*

On 7/10/2016 Leslie said...

L-Ornithine HCL Powder
After taking this supplement in capsule form, I decided to try the powder. I ordered from Bulk Supplements based on reviews and price/value. This is my first time ordering from here and I am very satisfied. Shipping was super fast and the value could not be matched. The powder is tasteless and mixes easily. I plan to order more from this company.*

On 5/14/2016 Michael said...

L-ornithine hcl
I ordered this for its sleep-aid properties. I mixed it with tryptophan (also from Bulk Supplements,) and it really worked well. I went to sleep fairly quickly and got better rest than usual. I plan to also use some in my pre-workout drink as suggested. This is another great product from Bulk Supplements, who never let me down.*

On 4/21/2016 Charles Keller said...

Got this for my GH support stack.
Works nice to boost your natural GH production along with Arginine. I take it right after a workout. Good quality pure product. Very satisfied!!!*

On 4/14/2016 Natalia said...

Happy with Ornithine HCL Powder
Fast delivery, reasonable price, high quality product. I'm using the Ornithine HCL powder in a pre-workout mix and a pre-sleep mix, as a general GH-promoting supplement. So far so good - no problems, and optimistic about what the long-term results will be.*

On 3/21/2016 Bradley said...

Great Pre-workout supplement
I use this every morning along with Citrulline to get through rigorous workouts. Helps keep you going for long sessions. I was off of it for awhile and noticed fatigue after my third worksheet. This week I have gotten two extra worksheets since starting back up.*

On 2/27/2016 Tom said...

Great Supplement For Muscle Gain & To Enhance Sleep
I've used ornithine for years to help maintain muscle mass & help me sleep at night. This is my first order for ornithine from BulkSupplements and it compares favorably with other brands at a much better cost. Thank you! *

On 1/30/2016 Kenton said...

Quick, good quality
As usual W/, quick delivery and quality product. I'm using it for pre-workout mix and as a general GH-promoting amino acid supplement regimen for experimental purposes.*

On 12/8/2015 Matthew said...

l ornithine hcl powder review
This stuff is awesome. Added it in with my preworkout and have noticed super stamina increase and with diet and regular training I'm noticing some fat loss. The is bulk supplements!*

On 11/12/2015 paul said...

Harder, more full muscle tissue
I don't know if it's this product or the addition or more salmon to my diet and heavy deadlifts.. But today I woke up, and could not believe how full my muscles looked in the mirror. I've taken a lot of different supplements, for a long time, but since I've started taking this about a week ago, twice a day, my body has changed. In a great way. Muscles are full and hard. Great sleep at night, great sex drive, and feeling all around pretty good. I highly recommend any person try this*

On 10/10/2015 Brendan said...

L-Ornithine HCL Powder
Excellent Product and service*

On 6/27/2015 Arlene said...

superior product and company
will repeat business very happy all around *

On 3/7/2015 ann said...

Good Product
My husband has been taking this Ornithine HCL for 6 mo or so. He takes it with his Acetyl L. carnitine and Creatine just before he lifts weights. He wouldn't be without it. *

On 3/2/2015 Donna said...

Ornithine HCL
This product is very potent, and definitely crosses the blood brain barrier. Go slowly with the dosing to avoid GI upset and diarrhea.*

On 12/28/2014 Rhonda said...

GH support
This is the perfect powder to supplement in for some gh support. It works wonders at night. Honestly, can never go wrong with a product from this site. Have not had one problem. *

On 5/3/2014 zac said...

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