Parsley has long been one of several favorite Herbs of the old European Herbalists, for good reason. It is a powerhouse of benefits that many just don't expect from a common, widely available herb. It is also not advertised much, because there is no profit in that. They much rather have you buy exotic things from far, far away, and better yet in pills and powders for a lot of dollars. But look close to home for the best remedies. They share the same conditions that you experience.

As before, I found great info on a medically reviewed site - I'm always blown away that this is a thing now. And they can say things I can not.
However, with this link, I also found the typo of the year. Not to be "one of those" but yes, Parsley is great for Kidney health, but it does not remove Kidneys. I am pretty sure they meant to say Kidney stones. Just as a side note. And yes, because it does so many great things, is easily available and cheap, especially since you can grow it yourself, more is not better. Use it, enjoy it, even as a tea for digestion or for any of the things it addresses, but don't overdose. Take it regularly, then take little breaks in between. Culinary amounts are of no concern as a rule, medicinal strength and amounts require the same respect one exercises with all medicines. That as disclaimer and warning as usual. There is also a lot more info out there if you are interested, but this here to guide you in sorting it out. 
And just because they say that something "cures" something, that does not mean that one herb is able to weight lift a severe, possibly terminal disease. Don't blame the herb for "not working" as it is often done when unrealistic expectations are thrown at it. They can play their part in prevention and healing. If you have an upset stomach because you over indulged at a holiday meal for example, a little Parsley tea can work wonders, all by itself. For Kidney stones, it might need a few friends to help resolve the issue, but with extra time and patience it might be able to do it by itself. For more severe things, it should really part of a greater protocol, because these things are far more complex than one herb 

Here is what medicinenet.com says  (link for complete article)

"The widespread use of parsley in the kitchen reflects its status as the most often used herb. Parsley is considered a diuretic, blood purifier, and detoxifier. Regular intake is supposed to help digestion, enhance metabolism, and promote appetite.

Parsley has been used for millennia in traditional herbal therapy to treat a wide range of medical ailments, such as curing cancer, anemia, and arthritis, and as a carminative to reduce flatulence. Moreover, it is claimed to have aphrodisiac and hypotensive properties.

Including herbs and spices such as parsley in your food is a terrific way to improve taste without adding excess salt. Most importantly, it is an excellent method to supplement critical nutrients and get the full range of health advantages that the small herb has to offer."

Definitely worth reading
 21 impressive health benefits of parsley

Medically Reviewed on 7/15/2022