Horrible advice.
With exception of your liver, you cannot repair a damaged organ.
If you smoked for years and have COPD there is no cure. Same if you have a heart attack and part of the heart dies, you can't fix it. Same thing if you have arteriosclerosis, there is no fix.
Kidneys are not the same as an air filter on a car. It is a one and done situation. Once they get blown out that's it, damage is permanent.