Add Prime to get Fast, Free delivery
Amazon prime logo
FREE delivery Tuesday, April 29
Or Prime members get FREE delivery Tomorrow, April 25. Order within 3 hrs 39 mins.
Only 8 left in stock - order soon.
$$49.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$49.99
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
Amazon
Amazon
Ships from
Amazon
Returns
Non-returnable due to Food safety reasons
Non-returnable due to Food safety reasons
This item is non-returnable due to potential safety risk as an ingestible product, but if the item arrives damaged or defective, you may request a refund or replacement through Your Orders by providing an image of the item and its defects.
Read full return policy
Payment
Secure transaction
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Subscribe & Save:
10% 15%
$44.99 $0.65 per Ounce
$42.49 with 15 percent savings $0.62 per Ounce
First delivery on May 2
Ships from
Amazon
Save 10% now and up to 15% on repeat deliveries.
  • No fees
  • Cancel anytime
 Potential yearly savings :
Learn more
FREE delivery Tuesday, April 29
Or Prime members get FREE delivery Tomorrow, April 25.
In Stock
Deliver every:
×

Added to cart

$$49.99 () Includes selected options. Includes initial monthly payment and selected options. Details
Price
Subtotal
$$49.99
Subtotal
Initial payment breakdown
Shipping cost, delivery date, and order total (including tax) shown at checkout.
Ships from
Amazon
Amazon
Ships from
Amazon
Returns
Non-returnable due to Food safety reasons
Non-returnable due to Food safety reasons
This item is non-returnable due to potential safety risk as an ingestible product, but if the item arrives damaged or defective, you may request a refund or replacement through Your Orders by providing an image of the item and its defects.
Read full return policy

EFX Sports Karbolyn Fuel | Fast-Absorbing Carbohydrate Powder | Carb Load, Sustained Energy, Quick Recovery | Stimulant Free | 36 Servings (Fruit Punch)

4.7 out of 5 stars 2,970 ratings
$44.99 with 10 percent savings $0.65 per Ounce
One-Time Price: $49.99
$42.49 with 15 percent savings $0.62 per Ounce
One-Time Price: $49.99
Brief content visible, double tap to read full content.
Full content visible, double tap to read brief content.
Flavor Name: Fruit Punch
Size: 4.4 Pound
{"desktop_buybox_group_1":[{"displayPrice":"$49.99","priceAmount":49.99,"currencySymbol":"$","integerValue":"49","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"W%2BzN9AMk47VbiRuNPnnH%2BFdOW7OMh%2FTQEoWg2STnQWgAY%2BUjqTr8dYfoCPR93BTVatbvqEJSnw08Yid56lE726g1m2oI6bELKWy9t6bWn2vvTyyE3Wpv6Meu7zrXEVbC1PYaTcr5lR2oUCm17A7xBuKtCM7bN09QBtIBCpuljrqjkYMU1m8Ogez%2BMOg%2B9eAA","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}, {"displayPrice":"$44.99","priceAmount":44.99,"currencySymbol":"$","integerValue":"44","decimalSeparator":".","fractionalValue":"99","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":null,"locale":"en-US","buyingOptionType":"SNS","aapiBuyingOptionIndex":1}]}

Purchase options and add-ons

Brand EFX Sports
Flavor Fruit Punch
Unit Count 68.8 Ounce
Item Form Powder
Item Weight 0.3 Kilograms
Item dimensions L x W x H 6 x 6 x 10 inches
Diet Type Vegetarian
Product Benefits Endurance
Age Range (Description) Adult
Package Information Bottle

About this item

  • FAST-ACTING FUEL: Karbolyn is a clinically studied (with peer-reviewed, published research) carbohydrate supplement powder sourced from potato, rice, and corn. It’s specifically designed for elite athletes looking for a fast, safe, and effective way to quickly and easily load their muscles with lasting energy and promote faster recovery.
  • PEAK PERFORMANCE: Karbolyn enters the bloodstream like a simple sugar, yet it still provides sustained energy without the crash. It's absorbed faster than dextrose, simple sugar, bread, rice, and other carbohydrate products. Enjoy pre, intra, or post training to maximize and maintain high-intensity training, power output, and increase muscle fullness & pumps.
  • ALL CARBS AREN'T CREATED EQUAL: Unlike simple carbs that tend to cause a spike and crash or complex carbs that are slow to digest, leaving you feeling bloated and lethargic, Karbolyn combines the best of both by providing you with fast absorption and sustained energy without the bloating or crash. Plus, Karbolyn is 100% sugar-free, gluten-free, stimulant-free, and vegan-friendly.
  • MANUFACTURED IN-HOUSE: EFX Sports is part of a very small, elite group of brands who actually make their own products. That’s why we guarantee Karbolyn always meets label claims and is 100% banned-substance free (certified by Informed Sport). With Karbolyn, you'll know you have a pure and potent carbohydrate product.
  • 3X QUALITY TESTING: At EFX Sports, we proudly own every phase of the manufacturing process to ensure what's on the label is what's in the bottle...without question. In fact, every EFX Sports product must pass 3 critical quality checkpoints—before, during and after production.
› See more product details

Additional Details

Small Business
Shop products from small business brands sold in Amazon’s store. Discover more about the small businesses partnering with Amazon and Amazon’s commitment to empowering them.
Learn more
Small Business
This product is from a small business brand. Support small. Learn more
New on Amazon: AG1
Your daily health drink Shop now

Frequently bought together

EFX Sports Karbolyn Fuel | Fast-Absorbing Carbohydrate Powder | Carb Load, Sustained Energy, Quick Recovery | Stimulant Free
This item: EFX Sports Karbolyn Fuel | Fast-Absorbing Carbohydrate Powder | Carb Load, Sustained Energy, Quick Recovery | Stimulant Free | 36 Servings (Fruit Punch)
$49.99 ($0.73/Ounce)
Get it as soon as Tuesday, Apr 29
Only 8 left in stock - order soon.
Sold by XSNonline and ships from Amazon Fulfillment.
+
Nutricost Creatine Monohydrate Micronized Powder 500G, 5000mg Per Serv (5g) - 100 Servings, 17.9 Oz
$21.50 ($1.22/Ounce)
Get it as soon as Tuesday, Apr 29
In Stock
Sold by eSupplements and ships from Amazon Fulfillment.
+
Nutricost L-Glutamine Powder (500 Grams) Unflavored - Gluten Free & Non-GMO, 100 Servings
$23.95 ($1.36/Ounce)
Get it as soon as Tuesday, Apr 29
In Stock
Sold by eSupplements and ships from Amazon Fulfillment.
Total price: $00
To see our price, add these items to your cart.
Details
Added to Cart
Some of these items ship sooner than the others.
Show details Hide details
Choose items to buy together.

From the brand

Product Description

Karbolyn Fuel
Karbolyn Fuel
Karbolyn Fuel
Karbolyn Fuel
Karbolyn Fuel

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 6 x 6 x 10 inches; 10.58 ounces
  • Item model number ‏ : ‎ AAE1004/200/102
  • Date First Available ‏ : ‎ November 3, 2011
  • Manufacturer ‏ : ‎ EFX Sports
  • ASIN ‏ : ‎ B0062ZXGCQ
  • Country of Origin ‏ : ‎ USA
  • Customer Reviews:
    4.7 out of 5 stars 2,970 ratings

Important information

Ingredients

Post Workout

Directions

Mix 1 scoop in a shaker cup with 10-16 ounces of water and drink 60 minutes before exercise. Dosing Guide For Best Results: Pre-Workout (Energy & Performance) Mix 1 Scoop in 10-16 oz. of water. Intra-Workout (Intensity & Endurance) Mix 1 Scoop in 10-16 oz. of water. Post-Workout (Replenish & Recover) Mix 1 Scoop in 10-16 oz. of water. Storage: Keep lid tightly closed in a cool, dry place away from children.

Legal Disclaimer

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Customer reviews

4.7 out of 5 stars
2,970 global ratings

Review this product

Share your thoughts with other customers
Write a customer review

Customers say

Customers find this carb powder effective, noting it provides sustained energy and works well as an intra-workout supplement. The product mixes well with water and other ingredients, and customers appreciate its fast-digesting properties that shuttle insulin and glucose quickly to muscles. While many customers report no stomach issues, some mention experiencing stomach upset.

AI-generated from the text of customer reviews

Select to learn more

178 customers mention "Taste"146 positive32 negative

Customers like the taste of this carbohydrate powder, noting it has no aftertaste or residue in the mouth, and consider it one of the best carb powders available.

"This stuff is amazing. I chug it in the morning before Crossfit and I'm fueled the entire 1 hr...." Read more

"...The Blue Raspberry flavor is refreshing and easy to drink, not overly sweet or artificial-tasting...." Read more

"Great flavor. I usually do one scoop of this and one scoop of iso protein during a workout to get file I need." Read more

"The cherry bomb flavors is awesome I cant wait to try another flavor out." Read more

156 customers mention "Value for money"129 positive27 negative

Customers find the carbohydrate powder to be worth buying, with one mentioning it works well as a pre-workout supplement.

"...I was able to push through my workouts harder. This stuff works!" Read more

"...This is an amazing product; I can't believe I had never heard of it before...." Read more

"...I do notice it works best to mix and drink vs pre-mixing the night before and leaving it in the fridge for a morning workout...." Read more

"...Worked great. Within 8 minutes I felt fine. Didn't wolf down my oatmeal or anything. Ate it casually. Feel absolutely great 3 hours later...." Read more

140 customers mention "Carb content"140 positive0 negative

Customers appreciate the carb content of this supplement, finding it perfect for post-workout recovery and as an intra-workout supplement, with one customer noting it provides better energy and hydration than Gatorade.

"...I was able to push through my workouts harder. This stuff works!" Read more

"...I feel sustained endurance throughout my runs, and it helps keep my energy levels up without any stomach discomfort...." Read more

"...product and was skeptical of the claim that this provides a source of carbohydrates that is fast digesting AND also provides sustainable energy...." Read more

"...I also love it for my PM workouts along with a non-stimulant pre-workout after a long day at work...." Read more

68 customers mention "Energy level"68 positive0 negative

Customers report that the supplement provides sustained energy during workouts and helps boost muscle growth.

"...I chug it in the morning before Crossfit and I'm fueled the entire 1 hr. I actually felt the difference when I just ate a banana...." Read more

"...If you need a fast-absorbing, long-lasting energy source for endurance activities, EFX Sports Karbolyn Fuel is an excellent choice. Highly recommend!" Read more

"...And this stuff has absolutely been able to provide me sustainable energy for my entire workout consistently, for every single workout...." Read more

"...It provides me with just enough more energy in the tank to destroy my 2-mile run and pass all the younger soldiers by on the last 1/2 mile...." Read more

42 customers mention "Mixability"37 positive5 negative

Customers find that the carbohydrate powder mixes well with any protein and can be combined with various beverages, with one customer noting it works particularly well with cold water.

"...It mixes well with water and doesn’t leave any chalky residue...." Read more

"...Turns out it mixes really well with cold water and a shaker cup and isn't chalky of gummy at all...." Read more

"Mixes well and taste is very good" Read more

"...I like the neutral because I can mix it with my EAA Max watermelon for intra and it doesn't affect the taste at all...." Read more

35 customers mention "Strength"31 positive4 negative

Customers find the carbohydrate powder to be a solid meal replacement that provides endurance and strength, with one customer noting it helps prevent joint failure during long workouts.

"...It provides a steady, reliable source of energy without the crashes I’ve experienced with other carb-based supplements...." Read more

"...It’s a solid meal replacement for those who don’t enjoy eating breakfast but need some sustenance...." Read more

"...for 20+ years and this product used in conjunction with a high quality whey isolate and psyllium fiber or beet root powder makes the best meal..." Read more

"...It keeps my strength levels up and fuels my workout. High quality carb supp is definately useful pre or post...." Read more

22 customers mention "Digestibility"20 positive2 negative

Customers find the carbohydrate powder fast-digesting and effective for post-workout recovery, as it helps shuttle insulin and glucose quickly to muscles without causing bloating or upset stomach.

"...If you need a fast-absorbing, long-lasting energy source for endurance activities, EFX Sports Karbolyn Fuel is an excellent choice. Highly recommend!" Read more

"...It is very fast digesting, doesn't make me feel sleepy at all, and I have felt perfectly fueled throughout every single workout that I have taken it...." Read more

"Like having the extra boost during workout. Seems like the carbs are quick to digest and doesn’t hurt getting that extra calories." Read more

"...to any protein and don’t change flavor beside it is the best quick absorbing carb after gym .Loved help me with quick recovery ." Read more

18 customers mention "Stomach upset"11 positive7 negative

Customers have mixed experiences with stomach reactions to the supplement: some report feeling great 3 hours after consumption and no bloat, while others mention feeling upset and bloated.

"...Ate it casually. Feel absolutely great 3 hours later. Might do a 20-30min short session tonight rather than just the big workout this morning...." Read more

"...I got the blueberry one, doesn’t taste nothing like it, it also upsets my stomach and now I’m stuck with this, I’m super disappointed I wish they..." Read more

"...One reason I'm sold on Karbolyn is as others have said, I don't get any bloat or upset stomach, and more importantly I don't get the insulin spike..." Read more

"...It tastes great, mixes well, doesn’t upset the tummy. Have purchased tropical punch & blue razz...." Read more

Superior product that provides excellent performance advantages
5 out of 5 stars
Superior product that provides excellent performance advantages
I love this product. I have so much energy when I load with this before my workouts. I use it in several different aspects. I use this for long weightlifting workouts and before I take an Army Physical Fitness Test. It provides me with just enough more energy in the tank to destroy my 2-mile run and pass all the younger soldiers by on the last 1/2 mile. I also love it for my PM workouts along with a non-stimulant pre-workout after a long day at work. This product helps me pull the tail end of my workout off with a bang instead of barely getting through it and by not having to have a caffeine pumped pre-workout I can still get to bed and sleep well. Upon opening this bottle, the first thing I noticed is the texture, it reminded me of a finely ground instant mash potatoes so I was slightly worried about how it would mix. Turns out it mixes really well with cold water and a shaker cup and isn't chalky of gummy at all. I do notice it works best to mix and drink vs pre-mixing the night before and leaving it in the fridge for a morning workout. I got the Lemon Ice flavor and its very good and refreshing. I highly recommend adding this to your routine and your "must have on hand" supplement cabinet it is the real deal.
Hide
Thank you for your feedback
Sorry, there was an error
Sorry we couldn't load the review

Top reviews from the United States

  • TheKaizenOne
    5.0 out of 5 stars Fantastic Energy Source for Long Runs!
    Reviewed in the United States on March 4, 2025
    Flavor Name: Blueberry LemonadeSize: 4.4 PoundVerified Purchase
    The EFX Sports Karbolyn Fuel (Blue Raspberry) has been a game-changer for my long-distance runs! It provides a steady, reliable source of energy without the crashes I’ve experienced with other carb-based supplements. I feel sustained endurance throughout my runs, and it helps keep my energy levels up without any stomach discomfort.

    The Blue Raspberry flavor is refreshing and easy to drink, not overly sweet or artificial-tasting. It mixes well with water and doesn’t leave any chalky residue. I’ve noticed a big difference in my performance and recovery since using Karbolyn, and it’s now a staple in my training routine.

    If you need a fast-absorbing, long-lasting energy source for endurance activities, EFX Sports Karbolyn Fuel is an excellent choice. Highly recommend!
    One person found this helpful
    Helpful
     Report
  • MJ
    5.0 out of 5 stars Amazing!
    Reviewed in the United States on February 20, 2025
    Flavor Name: StrawberrySize: 2.2 PoundVerified Purchase
    This stuff is amazing. I chug it in the morning before Crossfit and I'm fueled the entire 1 hr. I actually felt the difference when I just ate a banana. I was able to push through my workouts harder. This stuff works!
    3 people found this helpful
    Helpful
     Report
  • Erik
    5.0 out of 5 stars Absolutely amazing!
    Reviewed in the United States on June 27, 2024
    Flavor Name: Lemon IceSize: 4.4 PoundVerified Purchase
    I've been working out consistently for around 17 years and have been an athlete most of my life. My pre-workout meal has always been my least favorite because I'm never usually hungry at that time and I would always get a little bit sleepy from the insulin spike caused by taking in pre-workout carbs and I absolutely hated that. Yet I knew that my workout performance would suffer if I went into it without having had any recently consumed carbs, so for the longest time I had always just kind of sucked it up and ate some oatmeal or a couple of bananas or something. I came across this product and was skeptical of the claim that this provides a source of carbohydrates that is fast digesting AND also provides sustainable energy. My experience with fast digesting simple carbs is that the energy lasts about as fast as it digests, which is never very long. But after having taken this stuff before every workout for a couple of weeks now, I can confidently say that the claims made by this product are very much legit. It is very fast digesting, doesn't make me feel sleepy at all, and I have felt perfectly fueled throughout every single workout that I have taken it. I lift weights and also do cardio afterwards, so my full workout typically takes me about an hour and a half by the time I'm done. And this stuff has absolutely been able to provide me sustainable energy for my entire workout consistently, for every single workout. This is an amazing product; I can't believe I had never heard of it before. I will never reach for any other source of pre-workout carbohydrates as long as I have access to this stuff.
    13 people found this helpful
    Helpful
     Report
  • Scotti
    5.0 out of 5 stars Superior product that provides excellent performance advantages
    Reviewed in the United States on June 12, 2023
    Flavor Name: Lemon IceSize: 4.4 PoundVerified Purchase
    I love this product. I have so much energy when I load with this before my workouts. I use it in several different aspects. I use this for long weightlifting workouts and before I take an Army Physical Fitness Test. It provides me with just enough more energy in the tank to destroy my 2-mile run and pass all the younger soldiers by on the last 1/2 mile. I also love it for my PM workouts along with a non-stimulant pre-workout after a long day at work. This product helps me pull the tail end of my workout off with a bang instead of barely getting through it and by not having to have a caffeine pumped pre-workout I can still get to bed and sleep well.
    Upon opening this bottle, the first thing I noticed is the texture, it reminded me of a finely ground instant mash potatoes so I was slightly worried about how it would mix. Turns out it mixes really well with cold water and a shaker cup and isn't chalky of gummy at all. I do notice it works best to mix and drink vs pre-mixing the night before and leaving it in the fridge for a morning workout. I got the Lemon Ice flavor and its very good and refreshing.
    I highly recommend adding this to your routine and your "must have on hand" supplement cabinet it is the real deal.
    Customer image
    Scotti
    5.0 out of 5 stars
    Superior product that provides excellent performance advantages

    Reviewed in the United States on June 12, 2023
    I love this product. I have so much energy when I load with this before my workouts. I use it in several different aspects. I use this for long weightlifting workouts and before I take an Army Physical Fitness Test. It provides me with just enough more energy in the tank to destroy my 2-mile run and pass all the younger soldiers by on the last 1/2 mile. I also love it for my PM workouts along with a non-stimulant pre-workout after a long day at work. This product helps me pull the tail end of my workout off with a bang instead of barely getting through it and by not having to have a caffeine pumped pre-workout I can still get to bed and sleep well.
    Upon opening this bottle, the first thing I noticed is the texture, it reminded me of a finely ground instant mash potatoes so I was slightly worried about how it would mix. Turns out it mixes really well with cold water and a shaker cup and isn't chalky of gummy at all. I do notice it works best to mix and drink vs pre-mixing the night before and leaving it in the fridge for a morning workout. I got the Lemon Ice flavor and its very good and refreshing.
    I highly recommend adding this to your routine and your "must have on hand" supplement cabinet it is the real deal.
    Images in this review
    Customer imageCustomer imageCustomer image
    14 people found this helpful
    Helpful
     Report
  • Kyle
    5.0 out of 5 stars Great flavor!
    Reviewed in the United States on March 8, 2025
    Flavor Name: Blueberry LemonadeSize: 4.4 PoundVerified Purchase
    Great flavor. I usually do one scoop of this and one scoop of iso protein during a workout to get file I need.
    Helpful
     Report
  • 7ony
    4.0 out of 5 stars Great product and price but…
    Reviewed in the United States on December 14, 2023
    Flavor Name: NeutralSize: 4.4 PoundVerified Purchase
    Please don’t use UPS, the UPS guy left my product on my neighbor’s apartment, plus they don’t send photos adhere they put it(Amazon do), my neighbor was kind enough to bring it back
    Helpful
     Report
  • stephen haraszkiewicz
    5.0 out of 5 stars Great Carbs!
    Reviewed in the United States on March 14, 2025
    Flavor Name: NeutralSize: 2.2 PoundVerified Purchase
    Carbs are necessary fuel for energy, this product is great but not a bargain!
    Helpful
     Report
  • Ken Farrell
    5.0 out of 5 stars Great product
    Reviewed in the United States on October 2, 2024
    Flavor Name: Raspberry LemonadeSize: 4.4 PoundVerified Purchase
    I use this product every time I go to the gym. Drink on the way and at the gym. Great for energy and glycogen. Fuels the muscles and resulting in more sustained energy, especially on big muscle group days
    Helpful
     Report

Top reviews from other countries

Translate all reviews to English
  • Othman
    1.0 out of 5 stars El producto esta rompido
    Reviewed in Spain on November 25, 2023
    Flavor Name: StrawberrySize: 4.4 PoundVerified Purchase
    Fatal!!
    Customer image
    Othman
    1.0 out of 5 stars
    El producto esta rompido

    Reviewed in Spain on November 25, 2023
    Fatal!!
    Images in this review
    Customer image
    Report
  • Ricky Reviews
    5.0 out of 5 stars Perfect for endurance!
    Reviewed in Canada on March 15, 2025
    Flavor Name: StrawberrySize: 4.4 PoundVerified Purchase
    Awesome carb source for fueling workouts! It digests fast, doesn’t cause bloating, and gives a nice, steady energy boost without crashes. Perfect for endurance training or post-workout recovery. I love how easily it mixes—a must-have for athletes!
    Report
  • レオナルド
    5.0 out of 5 stars ストイック
    Reviewed in Japan on April 14, 2020
    Flavor Name: NeutralSize: 4.4 PoundVerified Purchase
    忙しくてなかなか炭水化物を取れない日でもかなり助かる
    Report
  • theresa
    5.0 out of 5 stars Awesome carb powder!
    Reviewed in Canada on January 26, 2025
    Flavor Name: Cherry LimeadeSize: 4.4 PoundVerified Purchase
    Works great! I prefer the unflavored one but it definitely helps to get carbs when I need.
    Report
  • Roi gal
    5.0 out of 5 stars Best carb
    Reviewed in Canada on May 20, 2023
    Flavor Name: Blue Razz WatermelonSize: 4.4 PoundVerified Purchase
    Been using for 6 months now
    Best results I ever got.
    Report

Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.