Which product type is specifically recognized as a dietary supplement by the definition provided?

Electrolyte drinks are specifically recognized as dietary supplements because they are formulated to provide essential nutrients, such as electrolytes (sodium, potassium, magnesium, etc.), that are lost through sweat during exercise or physical activity. The primary purpose of these drinks is to enhance hydration and replenish key nutrients, which aligns with the broader definition of dietary supplements that are intended to supplement the diet by providing additional nutrients, vitamins, or minerals.

In contrast, the other options—canned vegetables, fast food meals, and frozen dinners—are primarily whole food products or meals and do not serve the specific purpose of supplementing dietary intake in the same way. While these items can contribute to overall nutrition, they do not fit the definition of a dietary supplement as they are not intended to provide a direct source of concentrated nutrients aimed at enhancing health or performance.