EFX Sports Karbolyn is a performance carbohydrate powder built on Karbolyn® — a patented homopolysaccharide derived from potato, rice, and corn, engineered to absorb as fast as simple sugars while sustaining energy like complex carbs. Invented by EFX Sports scientist Dr. Jeff Golini, Karbolyn delivers 50g of fast-absorbing, sustained-release carbohydrates per scoop with zero sugar, zero fat, and zero protein, making it an ideal glycogen fuel for pre-, intra-, and post-workout carbohydrate loading. Informed Sport Certified and banned substance free.
| Spec |
Per Serving |
| Serving Size |
~52.5g (1 scoop) |
| Servings (4lbs) |
~34 |
| Calories |
200 |
| Total Carbohydrates |
50g |
| Sugars |
0g |
| Protein |
0g |
| Fat |
0g |
| Certification |
Informed Sport, Banned-Substance Free |
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50g Karbolyn® homopolysaccharide per scoop — fast absorption with complex carb sustained-release for glycogen loading without a sugar spike
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Zero sugar, zero fat, zero protein — a pure carbohydrate fuel source, completely stackable with any other supplement
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Informed Sport Certified and banned substance free — trusted by competitive athletes for drug-tested sport
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Vegan, gluten-free, stimulant-free — clean fuel with no unnecessary additives
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4lbs / ~34 servings — a large-format container for high-frequency carbohydrate loading protocols
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Developed by Dr. Jeff Golini — scientist and founder of EFX Sports, with decades of sports nutrition research
Best for: Endurance athletes, bodybuilders, and anyone who carbohydrate-loads pre- or intra-workout for maximum performance. Ideal as a glycogen replenishment tool post-workout or as caloric support during high-training-volume phases.
Not ideal for: Those on low-carb or ketogenic diets, or anyone looking for a protein-and-carb blend (Karbolyn is a pure carb product).
Ingredients & Allergens
Primary ingredient: Karbolyn® (homopolysaccharide derived from potato, rice, and corn) 50g. Flavored versions include citric acid, natural and artificial flavors, sucralose, and food coloring (varies by flavor). Neutral/Unflavored version contains only Karbolyn with no additives.
Allergens: Gluten-free and vegan. Consult the product label for the complete ingredient list and allergen declaration by flavor.
Who Is This For?
EFX Sports carbohydrate supplement is designed for endurance athletes and strength athletes who need rapid, sustained energy during prolonged training sessions or for post-workout glycogen replenishment. It suits anyone in a caloric surplus who needs easily digestible carb calories.
Who Is This NOT For?
Not recommended for those following a low-carb or ketogenic diet, individuals managing blood sugar conditions without medical guidance, or sedentary individuals who do not have elevated carbohydrate energy needs.
Why Buy From Bulldog Nutrition?
Bulldog Nutrition is an authorized Canadian and US retailer of EFX Sports products. We source directly from the brand — never from grey market or unauthorized distributors — so every order is genuine and fresh.
- ✓ Authorized EFX Sports retailer — authentic products only, never grey market or counterfeit
- ✓ Ships across Canada and the US — fast, reliable delivery to your door
- ✓ 10+ years in business — a track record you can rely on
- ✓ 4.7/5 stars from 2,400+ verified customer reviews
- ✓ Ongoing support available — reach us anytime via email or live chat
