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Can you take zinc and vitamin A at the same time? 

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Combined short-term zinc supplementation and a single dose of vitamin A has no significant effects on weight and length increments in children over a 6-mo period.
The combination of zinc and vitamin A is the best dual supplement option.
The available studies clearly show that zinc fortification can increase dietary zinc intake and total daily zinc absorption.
These data indicate an interaction between zinc and vitamin A metabolism possibly at the level of vitamin A mobilization from the liver.
Excessive zinc intake can have toxic effects, and questions about patients' use of vitamin and mineral supplements should be asked when medication histories are taken.
Zinc also assists in transporting vitamin A from the liver.
Supplementation with zinc, iron, or both improved indicators of vitamin A status.
Addition of zinc to low-dose vitamin A in this study did not improve the vitamin A status of children and cannot explain morbidity effects of the intervention.
Zinc deficiency may indirectly influence the metabolism of Vitamin A via reduction of the levels of circulating proteins.
The results of this study agree with previous observations of a metabolic interaction between zinc and vitamin A and suggest an interaction between iron and vitamin A metabolism.
Vitamin A and zinc have more heterogeneous effects in different subgroups of children.

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