What kind of zinc naturally occurs in plants? Zinc oxide, zinc sulphide, or something else?
Different vegetables contain different types of Zinc compounds, so we can't say specifically which type of zinc compound is there in vegetables.
Zinc Oxide is the most used supplement in the U.S.
Zinc carbonate is also present, which our body cannot absorb.
Also they can contain zinc picolinate, zinc gluconate or zinc citrate (zinc picolinate is better than zinc gluconate.), zinc glycinate, etc.