Cannot hurt as long as you dp not have kidney disease. And even that is questionable. You made a fantastic decision. Happy that it is working for you. FYI. At 3000mg daily you are, most likely benefitting from increased glutathione levels, as well.
Many good practitioners and researchers believe vitamin C should be part of the treatment. Their experience should not be discounted.
As a result of taking that much daily my fingernails are a lot stronger and my hematocrit level went from 32/33 to 46-49.