EFX Sports - Karbolyn Ready-To-Drink

EFX Sports Karbolyn Fuel RTD is Karbolyn in a bottle — the same clinically studied homopolysaccharide performance carbohydrate derived from potato, rice, and corn, pre-mixed and ready to drink. No shaker. No powder. No preparation. Open the bottle, drink it, train. Each 16oz bottle delivers approximately 50g of Karbolyn and 200 calories at zero sugar. Zero caffeine. Zero stimulants. Gluten free. Vegan. Informed-Sport certified and 100% banned-substance free. Made entirely in-house by EFX Sports. Sold in 12-bottle cases.†

Supplement Facts — EFX Sports Karbolyn Fuel RTD (Per 1 Bottle / 16 fl oz)

• Calories — ~200
• Total Carbohydrate — ~50g
• Karbolyn (Homopolysaccharide derived from Potato, Rice, and Corn) — ~50g
• Caffeine — 0mg
• Sugar — 0g
• Protein — 0g
• Fat — 0g
• Other Ingredients: Purified Water, Citric Acid, Natural Flavor, Sucralose, Potassium Sorbate, Potassium Benzoate, Sodium Benzoate, Silicon Dioxide
• 12 bottles per case. 16 fl oz per bottle.
• Zero sugar. Zero stimulants. Gluten free. Vegan.
• Informed-Sport certified — 100% banned-substance free
• Manufactured in-house by EFX Sports. Triple quality tested.

The Case for the RTD Format

Karbolyn Fuel powder and Karbolyn Fuel RTD contain the same active ingredient at the same dose — approximately 50g of Karbolyn homopolysaccharide per serving. The RTD exists to solve a specific practical problem: the powder requires a shaker, water, and preparation at the point of use. For athletes training at commercial gyms, competition venues, team facilities, or anywhere a tub isn't immediately accessible, that preparation barrier is real. Karbolyn Fuel RTD is the answer — same carbohydrate, same performance, no preparation required.†

The pre-mixed format also has advantages beyond convenience. Consistent dosing per bottle eliminates the variability of scooping. The liquid is already fully dissolved and homogenized — no clumping, no sediment, no mixing required. And because the bottle is sealed and shelf-stable before opening, it travels better than an open shaker of pre-mixed powder. For athletes who want Karbolyn available at the venue, at the gym, in the gym bag, or in the refrigerator ready to grab on the way out the door, the RTD format simply delivers it.†

The Karbolyn Carbohydrate — Why It's Different From Sports Drinks

Standard pre-mixed sports drinks — Gatorade, Powerade, most RTD athletic beverages — are built on simple sugars: sucrose, glucose, fructose. A 20oz Gatorade contains approximately 34g of sugar and 140 calories. Karbolyn Fuel RTD contains zero sugar and approximately 200 calories from 50g of Karbolyn — a homopolysaccharide engineered through EFX's proprietary Enzymatic Milling Process to provide rapid gastric emptying (faster than dextrose) combined with a sustained, crash-free blood glucose curve (clinically documented vs. dextrose in an IRB-approved human trial). The practical difference: Karbolyn Fuel RTD delivers nearly three times the carbohydrate of a standard sports drink without the sugar load, insulin spike, or crash — at zero sugar.†

It is also stimulant-free — making it appropriate at any time of day, for any athlete regardless of caffeine sensitivity, and stackable directly with any caffeinated pre-workout without concern about combined stimulant load. This is the version for athletes who already have caffeine handled (through their pre-workout, their coffee, or Ghost Energy) and want to add carbohydrate fuel alongside it without adding more stimulants.†

When and How to Use Karbolyn Fuel RTD

Drink one bottle 15-30 minutes before exercise for pre-workout glycogen loading and muscle volumization — the 50g Karbolyn dose primes muscle glycogen stores and drives cellular hydration for the carbohydrate-driven pump that high-carb pre-training produces. During training, sip on one bottle across a session exceeding 60-75 minutes to maintain glycogen availability and sustain training intensity through the latter portion of the workout. Post-workout, one bottle replenishes glycogen in the elevated glycogen synthase window that persists for 30-60 minutes after training completion.†

Because it is stimulant-free, Karbolyn Fuel RTD can be used any time — morning, afternoon, evening, or late training sessions where caffeine would interfere with sleep. Stack it with any caffeinated pre-workout by drinking it alongside the pre-workout serving for a combined carbohydrate-plus-stimulant approach, or use it standalone as the complete pre-training fuel for athletes who do not use stimulant pre-workouts.†

Frequently Asked Questions About Karbolyn Fuel RTD

1. What's the difference between Karbolyn Fuel RTD and Karbolyn Energy RTD?
   The only difference is caffeine. Karbolyn Fuel RTD contains zero stimulants — pure Karbolyn carbohydrate in water. Karbolyn Energy RTD contains the same 50g of Karbolyn plus 250mg of caffeine per bottle. If you are using a separate caffeinated pre-workout and want to add carbohydrates without adding more caffeine, use the Fuel RTD. If you want carbohydrates and caffeine in one bottle with no separate pre-workout, use the Energy RTD. Both are Informed-Sport certified and manufactured to the same quality standards.†
2. Can I stack Karbolyn Fuel RTD with Ghost Legend V4 or another pre-workout?
   Yes — and this is one of the best uses for the Fuel RTD. Ghost Legend V4 provides 300mg caffeine, 6g citrulline, beta-alanine, betaine, tyrosine, and the full performance stack, but only approximately 1-2g of carbohydrates. Adding one bottle of Karbolyn Fuel RTD alongside your Legend V4 serving adds 50g of fast-absorbing performance carbohydrates and 200 calories of clean fuel to the full pre-workout formula — the combination delivers the carbohydrate load for glycogen and muscle fullness that a stimulant pre-workout alone cannot provide.†
3. Is Karbolyn Fuel RTD appropriate for tested athletes in competition?
   Yes — Informed-Sport certification means every batch has been independently tested for substances banned by WADA and major sports governing bodies. Informed-Sport is the same certification used by elite professional and Olympic athletes for supplement safety assurance in tested competition. The RTD format is certified to the same standard as the powder, making it appropriate for collegiate athletes under NCAA drug testing, professional athletes with league testing, and any competitive athlete who needs absolute confidence in their supplement's banned-substance status.†
4. Why does the RTD contain preservatives?
   The dry powder format does not require preservatives — low moisture prevents microbial growth. The pre-mixed RTD contains purified water, creating an environment that requires preservation for shelf stability. Potassium Sorbate, Sodium Benzoate, and Potassium Benzoate are standard FDA-approved preservatives for RTD beverages, used at concentrations well within established safety parameters. The product is shelf-stable until opened — refrigerate after opening and consume within 24 hours.†

How to Use EFX Sports Karbolyn Fuel RTD

Drink 1 bottle (16 fl oz) approximately 15-30 minutes before exercise. Can also be consumed during training for intra-workout glycogen maintenance, or immediately post-workout for glycogen replenishment. Do not exceed 3 bottles per training session. Zero caffeine — appropriate any time of day. Refrigerate after opening. Gluten free. Vegan. Informed-Sport certified.†

Free shipping does not apply to this product. Liquid product exclusion applies at Get Yok'd.

Why Buy at Get Yok'd

• Real-time inventory across all five Southern California stores
• Available in Burbank, Glendale, Glendale Galleria, Pasadena, and North Hollywood
• Authorized retailer of EFX Sports
• One of the best loyalty programs in the supplement industry — earn rewards on every purchase
• Owned and operated by fitness enthusiasts who actually use what we sell

Who Should Not Use Karbolyn Fuel RTD

• Not for use by persons under 18 years of age without physician guidance
• Do not use if you are at risk for or being treated for diabetes — contains approximately 50g of rapidly absorbed carbohydrate per bottle
• Not for pregnant or nursing women without physician guidance
• Individuals with corn, potato, or rice starch sensitivities or allergies should avoid this product
• Refrigerate after opening and consume within 24 hours
• Consult a physician before use if you have any medical condition or take any prescription medications
• Keep out of reach of children

†These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.