ULTRA KARBS™ - Natural | GNC

SirenLabs™ ULTRA KARBS™ - Natural


Item # 502700


Size: 2 lb(s)

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KarboLyn® is specifically designed for the serious athlete looking for a fast, easy, convenient and safe way to load the muscle with readily accessible muscle energy (glycogen). KarboLyn® is a patented carbohydrate that contains a series of very unique properties. Because it passes through the stomach very quickly, it acts like a pump, pulling water and nutrients along with it. This high-tech carbohydrate actually moves through the stomach 80% faster than dextrose or sugar. KarboLyn® also has a higher solution osmolality than dextrose, sucrose, or other carbohydrate powder mixes on the market. This is due to its exclusive patent pending process. KarboLyn® is completely sugar free and is produced using a newly developed "Enzymatic Milling Process." The food sources used to produce the KarboLyn® are corn, potato, and rice, and the finished product is a modified molecular mass polysaccharide that is instantized and absorbed very quickly for maximum biovailability.*

With a high molecular weight and low osmolarity, meaning it bypasses the stomach and is absorbed by the intestines for immediate assimilation, waxy maize acts as a "super transporter," helping to shuttle nutrients into the body at a higher absorption rate.*

Fast-, medium-, and slow-acting carbohydrates before, during, and after intense exercise are a necessity for serious athletes to improve their performance and maximize their recovery.* ULTRA KARBS™ features patented KarboLyn® and Waxy Maize together to supercharge your pre-workout for more intense gains. ULTRA KARBS™ can also be added to your favorite post-workout protein shake to optimize recovery. USE ULTRA KARBS™ IF YOU ARE A
  • Mass Gainer – to facilitate more lean muscle mass.*
  • High School Athlete – formulated without creatine or stimulants.
  • CrossFit – for a readily available energy source for a long duration of time.
  • Runner/Endurance – to carbo-load quickly for maximum performance.*
  • Bodybuilder – to spike insulin and glycogen levels, and put yourself in a serious anabolic state for muscle hardness, increased fullness, and generating an intense pump.*

Label (click image to enlarge)


FOR PRE-WORKOUT: Mix 1–2 full scoops of ULTRA KARBS™ with 10 oz. of cold water 30 minutes before exercise/training. Stack ULTRA KARBS™ with any pre-workout supplement to maximize your performance and endurance.*

FOR POST-WORKOUT: Mix 1–2 full scoops of ULTRA KARBS™ with 10 oz. of cold water and use immediately following your exercise/training. You can also add ULTRA KARBS™ to your favorite protein or post-workout drink immediately following exercise for greater recovery and to fight fatigue.*

NOTE: ULTRA KARBS™ is an instantized formulation and is designed to mix and dissolve easily in liquids. Due to settling, a natural occurrence with powders, variations in the powder height level may vary from bottle to bottle. Additionally, powder density may be affected as a result of the settling, which may cause slight variations in the scoop serving size. To be used as part of a physical conditioning program.


Mfd. Exclusively for SirenLabs™ 4509 South 143rd Street, Suite 1 Omaha, NE 68137

Nutrition Facts

Serving Size  1 Scoop
Servings Per Container  40

Amount Per Serving     % DV

  Calories from Fat 0  

Trans Fat 0  
Cholesterol 0  
Total Carbohydrate 25g   8%
  Dietary Fiber 0g  
Protein 0g  
Calories 100  
Sugars 0  
Sodium 0  
Saturated Fat 0  
Total Fat 0  

ULTRA KARBS™ Blend  25 g   **
KarboLyn® (Homopolysaccharide)  12.5 g   **
Waxy Maise Corn Starch  12.5 g   **

** Daily Value (DV) not established.


4.8 / 5.0
5 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
Improved Recovery
I am really impressed on how fast I was recovering with this product. I recently increased my training in effort to gain more lean muscle. I take one scoop post with my protein and you cant even taste the product. On leg days, I will take two. It did make my post workout shake a little thick but any carb product will do that. I noticed results the next day after I started using with having less soreness. I also added it to my preworkout before I crossfit to give me an easily digested carb source for sustained energy...great product!
October 15, 2013
Great for Good Gains
This product is great for bulking season, good potatoes and rice carbs, only thing I wish it was flavored but besides Karboyn which they don't make any more is the best carb supplement out there.
December 23, 2013
Quality Pump and energy!
Quality source of carbohydrates. Karbolyn and waxy maize mix that delivers an awesome pump and some great sustained energy!
October 8, 2013
Best Karbs Out There
These are the best carbs out there on the market. Take this post workout and you will not be let down by your results.
October 8, 2015
Phenomenal Energy Source
I stacked Ultra Karbs with SirenLabs' Shock'D pre-workout (1 scoop of each 30 minutes before my workout) and felt very strong during my workout. Was pushing the weights around with ease. Felt a very intense muscle pump as a result. I would highly recommend this combo if you're serious about cutting edge results.
October 13, 2013