Celery Seed Extract can be used to treat joint pain gout & exhaustion. The properties in celery extract can be used to decrease blood pressure & reduce blood clotting. Celery Seed Extract reduces blood pressure due to a compound known as 3-nbutylphthalide or 3n B for short. This is due to its physiological properties acting as a diuretic & vasodilator. Celery is a member of the Umbelliferous family along with carrots parsley & fennel.