Can Apple Health introduce duplicate data?
Yes. Apple Health can store data from many applications that can also be synced directly to Validic. For example, if Jawbone UP is connected to Apple Health and also connected to the user's Validic App Marketplace, records with "source" equal to "jawbone" may have an equivalent duplicate record where "source" is equal to "validic_mobile".
Similarly, if Jawbone UP and Garmin Connect were both connected to Apple Health, all records from both apps would have a "source" equal to "validic_mobile". To disambiguate the records, Validic has implemented a Show Original Source Filter that will help to identify the "original_source" from which the record came.