fae8ed61_ogy_Health_Dietary_Supplements__4
[0] Deficiency [1] Common among patients fed intravenously, so it is added to the IV solution Moderate deficiency symptoms include growth retardation, poor appetite, mental lethargy, delayed wound healing, abnormalities of taste, smell and vision, skin changes Mild deficiency leads to low sperm count Moderate to severe deficiency in males leads to decreases sexual interest, mental lethargy, emotional problems [2] Essentiality in humans has yet to be proven [3] Yet to be established if nutritionally essential [4] 
No known role in humans
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