Amy T., RD replied:
It can be difficult to start managing your diet in early CKD, however you are doing the right thing by limiting your sodium intake. The first step may be to obtain a referral from your primary care doctor to see a nephrologist. A nephrologist may be able to answer your questions and may be able to refer you to a registered dietitian who works with CKD patients. You also may want to contact your local dialysis centers as they sometimes offer programs for CKD patients who are not on dialysis.
Below is a link to an article about figuring out the phosphorus content of foods. For a person consuming a 2,000 calorie diet the recommended daily value of phosphorus is 1000 mg. On the nutrition facts label, if you see phosphorus list at 10%, that is equal to 100 mg of phosphorus per serving.
Another helpful site to determine phosphorus contents of foods is the USDA Nutrient Database website.
Best of luck to you.