Below are some extracts from the national Institute of Health (USA), Please use the link to see the full text and foot-notes. https://ods.od.nih.gov/factsheets/cc/zinc.html

Zinc is an essential mineral that is naturally present in some foods, added to others, and available as a dietary supplement. Zinc is also found in many cold lozenges and some over-the-counter drugs sold as cold remedies.

. . . A daily intake of zinc is required to maintain a steady state because the body has no specialized zinc storage system [10].

Life Stage	Recommended Amount
Birth to 6 months	2 mg
Infants 7–12 months	3 mg
Children 1–3 years	3 mg
Children 4–8 years	5 mg
Children 9–13 years	8 mg
Teens 14–18 years (boys)	11 mg
Teens 14–18 years (girls)	9 mg
Adults (men)	11 mg
Adults (women)	8 mg
Pregnant teens	12 mg
Pregnant women	11 mg
Breastfeeding teens	13 mg
Breastfeeding women	12 mg