Which of the following is an impermissible substance by the NCAA?

The identifying of CLA (conjugated linoleic acid) as an impermissible substance by the NCAA is primarily due to its classification and the lack of sufficient research supporting its safety and efficacy for athletic performance. Unlike carbohydrate supplements, electrolyte drinks, and protein powders, all of which are commonly used and accepted in sports nutrition, CLA has been scrutinized in research regarding its use and potential side effects.

The NCAA has specific regulations concerning performance-enhancing substances, which include certain dietary supplements with claimed anabolic or weight loss properties. CLA falls under this scrutiny because it may promote fat loss and muscle retention, raising concerns about its compliance with NCAA's rules on performance-enhancing substances. In contrast, carbohydrate supplements, electrolyte drinks, and protein powders are considered permissible as they support energy production and hydration, crucial aspects of athletic performance, without the associated risks that raise red flags in NCAA regulations.