Natural Factors Celery Seed Extract is a 100% Pure, Non-GMO, Certified Organic and Vegan Formula with 70mg of Citrus Bioflavonoids. Many people who have arthritis are reminded of this common-sense dietary supplement by their doctors. Celery seed extract, which comes from the seeds of the celery plant (Apium graveolens), is an effective anti-inflammatory. This makes Celery Seed Extract a good supplement for people with arthritis and other inflammatory conditions. The active ingredient in celery seed extract is perine, which has been shown to possess potent anti-inflammatory properties.