Make the numbers easier to compare

A food name alone is not enough. Check which preparation the record describes, how many grams are in its portion and where the value came from. These guides explain the data behind our food tables.

Serving Size vs 100 g: How to Compare Food Nutrients

A worked calculation, rounding rules and a checklist for comparing portions.

Published October 12, 2026

Raw, Cooked or Canned: Choose the Matching USDA Record

How preparation and source identifiers help select the right reference record.

Published October 12, 2026

Try it with a food group

Fruit portions and vegetable portions show potassium both per serving and per 100 g. Follow a food name to see its original FDC record and other nutrients.

Who publishes these guides?

Renal Diet publishes these explanations of its own data and calculation method. They are not reviewed treatment plans. Read our editorial process, the source list and how to report a correction.

Track your own numbers against your own limits

Renal Diet adds up potassium, phosphorus, sodium, protein and fluid from an offline USDA food database, with the source on every value. No account, no scanner. You enter the limits your care team gave you, and "Can I eat this?" shows a traffic light against what is left today. A PDF report is there for your dietitian. Free to start; some features may need an optional premium subscription.

Values are USDA reference values for a standard serving. Your limits are set by your nephrologist or dietitian. Processed foods and phosphorus additives may differ. This is not medical advice.