Here are a few facts on Zinc:
1) Zinc is especially important during adolescence due to its role in the synthesis of protein, and its role as a cofactor in over 200 enzymes.
2) Zinc is required for sexual maturation to occur; males who are zinc deficient experience growth impairment and delayed sexual development.
3) Zinc and iron compete for absorption, therefore elevated intakes of one can reduce the absorption of the other.
4) Animal sources are a better source of zinc than plant based sources.