The deficiency puts children at increased risk for delayed growth and development as well as a host of illness. Researchers who reviewed the diets of children aged 12 to 18 months found Zinc, vitamin E and Iron intake declined significantly among many children. Researchers found the rates of smoking had nothing to do with the increase since the number of smokers has dramatically declined. Instead a rise in the prevalance of allergies among adults probably fueled the increase in allergy-induced Asthma. Researchers in texas are using genetic research to find a way for humans to grow new teeth in place of old ones.
Teeth usually stop growing after puberty .
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