Which of these terms describes substances that have long been available in Europe and are becoming increasingly available in the United States,and that seem to be more effective,perhaps due to higher dosages than those found in dried herbs?

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Standardized extracts are substances that have been extracted from herbs or plants and have a consistent level of active ingredients. These extracts are becoming increasingly popular in the United States because they are often more effective than traditional dried herbs, possibly due to higher dosages of active ingredients. Standardized extracts have been available in Europe for longer than in the United States.

Which of These Terms Describes Substances That Have Long Been