What is a common characteristic of unsweetened tinctures?

Unsweetened tinctures are indeed characterized as concentrated flavor extracts. Tinctures are typically made by steeping herbs, fruits, or other botanicals in a solvent like alcohol to extract their flavors, aromas, and therapeutic properties. The process results in a highly concentrated liquid that is often used in small amounts to add flavor or to utilize the medicinal qualities of the ingredients.

As concentrated extracts, unsweetened tinctures provide a potent flavor profile without the addition of sugars, making them versatile for use in various culinary and beverage applications. This concentration distinguishes them from other flavoring agents that may include added sugars or less intense flavor components.

The other options either imply the presence of ingredients that are not characteristic of unsweetened tinctures or describe attributes that do not apply to their nature, such as high sugar content, carbonation, or being served in large volumes. These aspects would contradict the definition and common use of unsweetened tinctures.