Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Highly branched cyclic dextrin (HBCD) is a type of carbohydrate frequently used in sports nutrition, particularly for endurance athletes. Scientific studies have investigated its effects on endurance performance, especially compared to other carbohydrate sources such as maltodextrin or glucose polymers. HBCD is characterized by its high molecular weight and low osmolality, which allows for rapid gastric emptying and absorption without causing gastrointestinal distress commonly associated with other carbohydrate sources.

Several randomized controlled trials have shown that HBCD supplementation during prolonged exercise can help maintain blood glucose levels, delay fatigue, and support sustained energy output. For example, research published in the Journal of Sports Science and Medicine (2013) demonstrated that athletes consuming HBCD during endurance cycling experienced lower perceived exertion and improved performance compared to those taking glucose or maltodextrin. Another study in Nutrients (2017) found that HBCD ingestion did not cause stomach discomfort and was effective at maintaining exercise performance in prolonged activities.

While the overall body of evidence is still growing, current scientific literature supports the use of HBCD as an effective carbohydrate source for enhancing endurance, particularly due to its favorable gastric properties and ability to deliver sustained energy. However, the evidence is not yet overwhelming or universally conclusive, resulting in a moderate rating for scientific support.

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