Glycosides are a large group of compounds in which the sugar part is connected by a glycosidic bond to another part of the molecule, called an aglycone. This structure occurs in many natural plant substances. The development of plant chemistry has allowed the description of numerous glycosides responsible for very different characteristics of raw materials, from color to bitter taste.
Characteristics and context
Examples are selected flavonoid glycosides and saponins. However, the common part of the name does not mean joint action: the properties are determined by the exact structure of the compound. "Glycosides" are not synonymous with glucose or evidence of the sweet taste of the preparation. If the label states the standardization of an extract, you need to check what group or specific substance the percentage applies to, instead of identifying it with the entire extract.
Meaning and application
The sugar part can influence the solubility and behavior of the molecule, while the aglycone is responsible for significant differences between individual compounds. The separation of these parts in a specific reaction leads to the formation of substances other than the initial glycoside. For this reason, name similarity is not sufficient to predict properties. The term includes both colored and colorless compounds, with different roles in the plant and very different functional meanings.
In practice
In the description of the extract you can find, for example, a declaration of flavonoid glycosides. This is more detailed information than the general word "glycosides", but still applies to a certain group, not necessarily to a single molecule. A fair comparison requires the same basis for the determination and the amount of extract per serving. A percentage does not independently describe the amount of a substance taken if it is not known what mass it refers to. The name of the chemical group does not replace the full recipe specification.