Many doctors don’t have a lot of training in nutrition. (That doesn’t necessarily mean they won’t help.) My doctor says I need to “eat for the labs”. By this he means the things that he monitors in my kidney function labs (calcium, oxalates, phosphorus, potassium, protein, sodium...). This may differ from person to person. So some patients need to be cautious of some things that others don’t have to be. My doctor also referred me to a renal dietician. These people can consider your specific situation and help customize a plan with you based on your needs, likes & dislikes. They can provide lists of foods and beverages that are ok for you and things that should be avoided or limited. Not everyone is the same. There is no such thing as “one size fits all”. That is why general information can seem conflicting.