What can be common causes of zinc deficiency?

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Individual dietary habits are the most common cause of zinc deficiency. Zinc is especially abundant in meat and seafood. Plant foods such as legumes and whole grains also contain zinc, but their absorption is somewhat lower. For this reason, vegetarians and vegans have a 50 % higher zinc requirement compared to people with a mixed diet. Other triggers for zinc deficiency can be pregnancy and breastfeeding, excessive alcohol consumption, certain medications and underlying GI conditions.