The new type is a covering structure for producing divalent iron. The main structure includes a main body, a pure iron layer accounting for 94% to 97% of the weight of the main body, a carbon layer accounting for 2% to 6% of the weight of the main body, a silicon layer accounting for at most 1% of the weight of the main body, and a manganese layer accounting for at most 1% of the weight of the main body.With the above structure, the user can place the main body in the liquid and produce divalent iron in the liquid with citric acid, so that when the user drinks the liquid, he can directly supplement the iron in the body, achieve a more healthy effect, and will not produce peculiar smell in the liquid.本新型為有關一種產生二價鐵之披覆結構，主要結構包括一主體，主體內具有一佔主體重量百分比94%至97%之純鐵層、一佔主體之重量百分比2%至6%之碳質層、一佔主體之重量百分比至多1%之矽質層、及一佔主體之重量百分比至多1%之錳質層。藉上述結構，使用者可將主體放置於液體內，並配合檸檬酸於液體內產生出二價鐵，讓使用者飲用此液體時能直接補充身體內的鐵質，達到更加健康的效果，並且不會於液體內產生異味。
