When adding a custom ingredient, older nutrition fact labels do not have vitamins and minerals expressed as weights, only percentages. You may need to convert these. Here are some formulas based on CFIA recommended daily values.
Vitamin C in mg = (%/100) X 90mg
Calcium in mg = (%/100) X 1300mg
Iron in mg = (%/100) X 18 mg
Vitamin A in mcg = (%/100) X 900 µg
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