When comparing ingredients it is important to understand key attributes, like source, strains and potency.  An herb sourced from Russia is not the same as the same named herb coming from China.  Herbs also can have numerous strains, some of which have little or no activity.   Standardized extracts guarantee a minimum potency of one or more of the key active ingredients in herbs. IE Rhodiola Rosea standardized to 5% rosavins.  In Rhodiola it is the total rosavin content that should be compared.  OptygenHP using a 5% extract contains a minimum 15mg rosavins from Rhodiola.