Hi and welcome to HCM. I hope you didn't annoy the lady nephrologist
by addressing this question only to the male nephrologist!! just kidding. How old is your mum? What other medical problems does she have? What is the exact size of the kidneys on the USG scan? What does the urine tests show? What is important to establish is whether the kidney impairment has happened over past few days or months to years. I suspect your nephrologist has made that assessment and labelled her CKD
(means kidney problem slowly DETERIORATING over may months or years). If her kidney problem is recent and there are active urinary sediments and urine protein, I would do a kidney biopsy
(as long as kidneys are more than 8 cmd) to clarify the diagnosis and guide treatment. I have not studied other forms of medicine, so can't comment about them or the benefits of them. I certainly see a lot of people who have come to harm from alternate medications, once again there is bias here since I donot get to see any one who might have improved. If your mother has less than 8CM kidneys +/- no proteinuria/ blood in urine, unlikely she will recover with any treatment. Once again with out assessing your mother personally and ensuring that there is no reversible problem I cannot confidentally say this.