are many, including being a diuretic, lowering blood pressure, joint and nerve pain... A friend has been drinking celery juice lately and finding less pain and stiffness in her knee(s). I'm eating a couple stalks right now and plan to buy some celery seed capsules....I believe I bought celery supp yrs ago but not recently. Forever working on these joints and pain and stiffness. umm.edu/health/medical/altmed/herb/celery-seedCachedSimilar May 7, 2013 ... Diuretics (water pills) -- Celery seed also acts like a diuretic, so it could make the effects of these medications stronger, raising the risk of ... There are MANY sites on the value of Celery.