1 Answer

he daily amount of zinc needed is defined in several different ways.

For U.S.—
Recommended Dietary Allowances (RDAs) are the amount of vitamins and minerals needed to provide for adequate nutrition in most healthy persons. RDAs for a given nutrient may vary depending on a person's age, sex, and physical condition (e.g., pregnancy).
Daily Values (DVs) are used on food and dietary supplement labels to indicate the percent of the recommended daily amount of each nutrient that a serving provides. DV replaces the previous designation of United States Recommended Daily Allowances (USRDAs).
For Canada—
Recommended Nutrient Intakes (RNIs) are used to determine the amounts of vitamins, minerals, and protein needed to provide adequate nutrition and lessen the risk of chronic disease.
Normal daily recommended intakes in milligrams (mg) for zinc are generally defined as follows:

Persons U.S. (mg) Canada (mg)
Infants and children birth to
3 years of age 5–10 2–4
Children 4 to 6 years of age 10 5
Children 7 to 10 years of age 10 7–9
Adolescent and adult males 15 9–12
Adolescent and adult females 12 9
Pregnant females 15 15
Breast-feeding females 16–19 15
This product is available in the following dosage forms:

Tablet
Capsule
Tablet, Extended Release