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    KARBFiX HBCD

    Also known as: KARBFiX, Pea/Tapioca HBCD

    Cyclic-glucanotransferase enzymatic processing of pea/tapioca starch yields branched cyclic α-glucan with comparable molecular profile to corn-HBCD; clinical data is preliminary.

    Last reviewed: 2026-06-23 · 1 indexed study

    Evidence Score
    42/100
    Allergen-free endurance carbIntra-workout fuelCorn-free HBCD alternative
    Data Completeness3/4 · 75%
    Evidence ScoreDosageSafetyLinked Studies

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    Overview

    KARBFiX is a novel pea- and tapioca-derived cyclic dextrin marketed as a corn-allergen-free analogue of Cluster Dextrin with similar low osmolality and rapid gastric emptying.

    Mechanism & Function

    Mechanism of Action

    Functionally analogous to HBCD: rapid gastric emptying, low osmotic load, sustained glucose delivery.

    Physiological Role

    Marketed for athletes with corn allergies or seeking grain-free formulations; ergogenic potential should be considered probable but is not yet proven in head-to-head trials.

    Primary Pathways

    Gastric emptyingSGLT1/GLUT2 absorptionGlycogen replenishment

    Performance / Health Relevance

    Manufacturer data suggest equivalent osmolality and gastric emptying to corn-HBCD; performance RCTs are pending.

    Evidence Review

    Overall42/100
    Human ClinicalN/A

    No human clinical studies indexed for this ingredient yet.

    Meta-AnalysisN/A

    No meta-analyses or systematic reviews indexed for this ingredient yet.

    Mechanistic78/100
    Real-World35/100
    Safety85/100

    Dimensions marked N/A have no indexed evidence of that class. They are shown as unavailable rather than scored.

    Practical Use & Dosage

    Minimum Effective Dose
    30 g per session
    Optimal Range
    60–90 g/h intra-workout
    Upper / Caution Level
    ~120 g/h with split dosing
    Timing
    Intra-workout
    Best Format
    Powder
    Bioavailability
    Manufacturer data show comparable gastric emptying to Cluster Dextrin.
    Absorption Considerations
    Identical intestinal pathway to other HBCDs.

    Safety & Interactions

    Side Effects

    • •Insufficient data — assume similar to HBCD

    Contraindications

    • Pea or tapioca allergy

    Drug Interactions

    • •Insulin

    Who Should Avoid

    • •Those with legume allergy

    Monitoring

    None routine.

    Frequently Asked Questions

    Auto-generated from indexed evidence — dosage, safety, interactions, and more.

    When is KARBFiX HBCD typically used or indicated?

    KARBFiX HBCD is most commonly used for: Allergen-free endurance carb, Intra-workout fuel, Corn-free HBCD alternative. Marketed for athletes with corn allergies or seeking grain-free formulations; ergogenic potential should be considered probable but is not yet proven in head-to-head trials.

    How does KARBFiX HBCD work?

    Functionally analogous to HBCD: rapid gastric emptying, low osmotic load, sustained glucose delivery.

    What is the recommended dose of KARBFiX HBCD?

    The optimal range is 60–90 g/h intra-workout. with a minimum effective dose of 30 g per session. Best taken: Intra-workout. Upper / caution level: ~120 g/h with split dosing.

    What are the side effects of KARBFiX HBCD?

    Reported side effects include: Insufficient data — assume similar to HBCD. Monitoring: None routine.

    Does KARBFiX HBCD interact with medications?

    Known or theoretical interactions: Insulin. Always check with a clinician before combining with prescription medication.

    Who should avoid KARBFiX HBCD?

    KARBFiX HBCD is generally not recommended for: Those with legume allergy; and Pea or tapioca allergy.

    How strong is the evidence for KARBFiX HBCD?

    Evidence level: Limited (overall score 42/100), based on 1 indexed study on SuppIndex.

    Research & References (1)

    Preliminary characterisation of pea/tapioca cyclic dextrin osmolality and gastric emptying

    In Vitro2023Low

    Pea/tapioca HBCD showed comparable physical properties to corn-HBCD; clinical validation pending.

    Trademark Ingredients

    KARBFiX™

    Manufacturer:

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    Research Overview

    Limited Evidence
    1Total Studies
    0Human Trials
    0Meta-Analyses
    2023Latest Study
    1Animal / In Vitro
    0Athlete Studies
    Primary data sourceIn Vitro
    Pooled evidence (meta-analysis / systematic review)No

    Cite this ingredient

    One-click citation export in APA, MLA, Chicago, BibTeX, or HTML. The URL below is stable and safe to link.

    Stable URL

    https://thesuppindex.com/ingredients/karbfix-hbcd

    SuppIndex. (2026). KARBFiX HBCD: Evidence summary, dosage and clinical studies. Retrieved October 16, 2026, from https://thesuppindex.com/ingredients/karbfix-hbcd

    Based on 1 indexed studies · Evidence level: Limited.

    Goal Ratings

    Endurance
    Recovery
    Hydration

    Stack Compatibility

    As with HBCD: pair with electrolytes, fructose, caffeine.

    ElectrolytesFructoseCaffeine