Celery seed extract

Celery seed oil contains a high amount of compounds known as phthalides. Studies show that celery seed components amongst others produce a relaxing, dilating effect that lowers blood pressure.

Also known as: Apium graveolens

examine.com

ConsumerLabs

Wikipedia

pubMed

https://www.lifeextension.com/Magazine/2014/10/Two-Natural-Plant-Extracts-Lower-Blood-Pressure/Page-01

https://www.ncbi.nlm.nih.gov/pubmed/26462366