The product includes database search and barcode scanning, alongside additional logging methods on supported plans. Match the serving size and product carefully; a barcode or large database does not eliminate entry errors. Check whether a figure is for a serving, a package or a weight-based portion.
For an illustrative portion check, compare the package's stated serving with the quantity actually eaten before saving a diary entry. If a label gives nutrition per 100 g and you ate 50 g, record that actual portion rather than an assumed full package. Matching a barcode identifies an entry; it does not confirm the amount eaten. Verify the item's description and units before using the saved numbers. This is a record-checking example, not a database-accuracy or weight-loss test.
When the serving unit is wrong,
MyFitnessPal's help recommends first adjusting the number of servings: a listed one-cup item can represent three-quarters of a cup with 0.75 servings. Alternatively choose a matching entry with the needed unit or create a food with the appropriate portion. A saved remembered meal can retain the adjusted amount; none of this verifies that the selected item's nutrients match your package.
For an incorrect database item, the documented mobile route is the item's nutrition details → Report Food, then choose the issue and submit corrected information. On web, open Food → Add Food → the item → Nutritional Information and answer No to Is this data accurate? Reports go through review, so do not assume the shared entry changes immediately. Choose a checked alternative for the current log rather than treating a submitted report as a completed correction. This review did not scan a product or measure database accuracy.
An anonymous macro-calculator example
In an anonymous browser session, an AI agent used MyFitnessPal's
public macro calculator with
fictional inputs: age 30, male, 180 cm, 80 kg, lightly active, weight maintenance and moderate carb/moderate fat. The output displayed
143 g protein, 356 g carbohydrate and 95 g fat per day.
Result screenshot.
The output is a general estimate for that invented scenario, not a goal for the reader. The calculator itself says estimates do not replace medical advice. We did not log a food, scan a barcode, inspect database accuracy, create an account or test Premium; the public calculator is separate from the app diary.