Standardized Herbal Extracts - Standardized extract are in many cases necessary to ensure you are getting the beneficial substances found in herbs. For example, we could sell you 100 mg of ginkgo biloba but it may contain only 5% or 5 mg of the actual beneficial substance. A standardized extract will contain nearly 5 times the amount of the beneficial substance. Read your labels carefully! Look for standardized herbs! Quality products produce quality results!