A food label scanner that helps you read the whole pack

Read the ingredients before the front-of-pack claims

Start with the ingredient list, not the marketing on the front. In the UK, ingredients are generally listed in descending order by weight, subject to exceptions. That makes the first few entries a useful clue to what makes up most of a packaged food, though it does not tell you the exact amount of each ingredient.

Then check the nutrition panel for the questions that matter to you: serving size, protein, energy, or a particular nutrient. In the United States, FDA guidance says the Nutrition Facts information is usually based on one serving, and some containers also show per-package values. A serving is a reference amount, not advice about how much you personally should eat.

What a scanner can add

A barcode gives an app a route to a product record. If that record includes ingredients and nutrition values, you can review them without typing everything out. A label photo is useful when a barcode record is missing or does not include the ingredient panel. Optimally supports both routes and explains ingredient-level ratings, processing flags, and relevant food context rather than showing an unexplained pass/fail alone.

For example, when choosing between two tubs of plain yogurt, look beyond a front label such as “high protein.” Compare the ingredient lists, check the serving basis of the nutrition panel, and see whether one includes extra sweeteners or thickeners. The app can organize that information; you still decide which trade-off fits your meal and preferences.

Where the number stops

Optimally’s score is an editorial guide based on the information available and the app’s stated criteria. It is not a clinically validated health scale or a complete measure of micronutrient density. A product can have missing nutrient fields; missing data must not be read as zero. A high score also does not mean a product is suitable for every person or every purpose.

Open Food Facts is a community-maintained product database. Its own documentation cautions that user-contributed data may be inaccurate, incomplete, or unreliable. Product formulations and packaging can change. If the scanned record conflicts with the physical label, trust the current pack for its ingredients and allergens and report the discrepancy through the app when possible.

A careful label-checking routine

• Scan the barcode, then compare the listed product name and pack image with the item you are holding.
• Open the ingredient list and look for the ingredients you care about, including any declared allergens.
• Check the nutrition panel’s units and serving basis before comparing numbers.
• Treat unclear, missing, or conflicting information as a prompt to inspect the package, not as reassurance.

Common questions