Single herb extracts are a solitary herb, typically in a base of certified organic alcohol. All of Herb Pharm"s single herbal extracts are prepared according to precise Good Manufacturing Practices and with individualized formulations or processes, which enable each herb to be extracted according to its own unique physical and biochemical characteristics. This attention to detail produces a finished extract which optimally represents the herb from which it was made.Herb Pharmpreparestheir Celery extract from the mature seed of Apium graveolens plants that are Certified Organically Grown without the use of chemical fertilizers, pesticides or herbicides.To assure optimal extraction of Celery seeds" bioactive compounds, the seeds are harvested only from fully mature, second-year Celery plants, and are then thoroughly extracted. Herb Pharm"sCelery seed is never fumigated or irradiated.