From what I have gathered I don't think there is much merit to it without the 3nB extract.
As Renew said, Hawthorne is good too, but I use them both together to get decent control over no.
And yes Brodie, that definitely showed in the study and practice to lower bp safely. I've not come across any side effects whatsoever from taking celery seed. I had a real issue on cycle until I added the celery 3nB extract in and now have it under control.