Add the protein amounts for the portions you actually recorded. The calculation is a ledger, not a recommendation to eat those foods or to achieve that particular total. A useful record tells you where every amount came from.
Make each row auditable
Imagine four invented portions providing 16 g, 28 g, 9 g and 22 g protein. Their total is 75 g. If the 9 g snack was not eaten, the corrected total is 66 g. Keep the correction attached to the record rather than leaving the food name in place while changing only the day’s total.
Watch for mixed serving bases
One row might describe a whole sandwich while another describes 100 g of yogurt. Both can be added if the amounts have already been scaled to what was eaten. Adding unscaled panel values does not produce a meaningful day total. Double-check powders, drinks and recipe portions where the entered amount may differ from one label serving.
Unknown is not a convenient zero
If a portion has no reliable protein figure, the ledger’s complete total is unavailable. You can report the known subtotal and name the missing portion. Do not quietly leave the item out and call the remaining number the full day.
The FDA serving explanation supports the source basis, not the invented meal pattern. This method is for understanding recorded amounts. It does not decide how much protein you need or replace individualized advice. If tracking becomes stressful or you need a medical nutrition plan, a numerical ledger alone cannot answer that wider question.
Sources and example boundaries
- FDA: serving information
Serving sizes and household/metric units on U.S. labels.
All food figures and prices in the worked example are invented to explain the method. They are not restaurant nutrition, tested recipes, shopping prices or personal dietary advice. Use the current label for the product you actually have.