Answer:
What the Nutrition Facts label on a food package indicates when it refers to 50% iron is the percentage of the recommended daily intake of this mineral contained in the food.
Step-by-step explanation:
The nutrition facts labels found on packaged or canned foods contain specified all the nutrients that the portion contained in the package has, with their respective percentage of the recommended daily intake for each of them.
In addition, these labels on food packages indicate the compounds used as preservatives, colorants and flavors.
If a nutrition facts label indicates that it contains "iron 50%" means that the food in the package contains 50% of the recommended daily intake of iron.