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Source Naturals, OKG (Ornithine Alpha-Ketoglutarate) Powder, 4 oz (113.4 g)

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Source Naturals, OKG (Ornithine Alpha-Ketoglutarate) Powder, 4 oz (113.4 g)

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Source Naturals, OKG (Ornithine Alpha-Ketoglutarate) Powder, 4 oz (113.4 g)

In Stock
  • Expiration Date: 08/2020
  • Shipping Weight:
    0.41 lbs
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  • Product Code: SNS-00255
  • UPC Code: 021078002550
  • Package Quantity: 4 oz
  • Dimensions:
    2.4 x 2.4 x 4.4 in, 0.35 lbs
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Product Overview


  • Athletic Series
  • Dietary Supplement

Ornithine alpha-ketoglutarate, or OKG, is a combination of the amino acid ornithine and alpha-ketoglutaric acid (AKG). AKG is an important component in the Krebs cycle, the chief energy-producing cycle in the body. Free-form ornithine is used by athletes and those who want to improve performance. OKG spares muscles the need to break down their BCAA's (branch chain amino acids) in order to generate glutamine, an important energy fuel. Glutamine is generated when AKG combines with ammonia released during intense muscle activity.

Suggested Use

1 teaspoon daily, mixed with water or juice.

Other Ingredients

Suitable for vegetarians and Hypoallergenic: contains no yeast, dairy, egg, gluten, corn, soy, or wheat. Contains no sugar, starch, salt, preservatives, or artificial color, flavor or fragrance.


Note: If you are pregnant, may become pregnant or breastfeeding, consult your health care professional before using this product.

Do not use if either tamper-evident seal is broken or missing. Keep out of the reach of children.

Supplement Facts
Serving Size: 1 Teaspoon (approx. 3.5 g)
Servings Per Container: 32
  Amount Per Serving %DV
Calories 15  
Total Carbohydrates 2 g 1%*
alpha-Ketoglutaric acid (as ornithine alpha-ketoglutarate [OKG]) 1.8 g
L-Ornithine (as ornithine alpha-ketoglutarate [OKG]) 1.2 g
* Percent Daily Values (%DV) are based on a 2,000 calorie diet.
† Daily Value not established.
iHerb Customer Reviews


Posted by Specialist on Aug 13, 2017 | Verified Purchase

The first time I opened it up, it was already clumpy with moisture even though the expiration date isn't for 3 years. The powder was filled all the way to the top of the bottle and a freshness pack squeezed into the top was obviously inadequate to keep it free flowing. I've used AAKG before and have not had a moisture problem like that. Thought I'd try OKG, but am not inspired to get another one from this brand. It is very tart, so in the meantime, diluting 1 tsp in 32oz of water/carbonated water makes it more palatable. If you take it with less liquid, it feels like it's etching your teeth! In combination with carbonated water It does seem to help with my energy.

Thanks for your feedback!

I'm really struggling to fight fatigue.

Posted by iHerb Customer on Apr 03, 2015 | Verified Purchase

I do not care at all for the taste, very very tart, but seems to help a little. Will stick with and hope for more, but right now a little is good!

Thanks for your feedback!

Product arrived spoiled

Posted by Health-Is-Wealth on Dec 20, 2012 | Verified Purchase

Purchased and opened April this year, expiry Oct next year. While the container arrived with seal in place, when I removed the lid and inner seal I found the powder was a solid yellow rock inside. I was able to chip away at it a little to get a taste in some water. It's tart/sour though I like that kind of flavour. What little I was able to mix seemed to dissolve well. Shame - I really wanted to try this. Won't purchase again - too costly. If this review was helpful to you, please click YES below - thank you. For reviews of all the products I have purchased from iHerb, please click my username above.

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Posted by iHerb Customer on Jul 05, 2011 | Verified Purchase

Excellent! Been looking everywhere for this! Necessary part of the Krebs cycle and no one seems to have it available!

Thanks for your feedback!


Posted by iHerb Customer on May 05, 2008 | Verified Purchase

I think this is a great product, have been using it on and off for years. I think this is a multi-faceted product, I find it helps both during workouts and also helping recovery afterwards as well as help reduce joint pain when taken long term.

Thanks for your feedback!