What is the primary benefit of using a straw for liquid oral iron administration?

Using a straw for liquid oral iron administration primarily minimizes teeth staining. Liquid iron can discolor teeth due to its high concentrations of iron. When using a straw, the iron is directed past the teeth, reducing the likelihood that it will adhere to the enamel and cause staining. This practice is particularly important for long-term therapy where patients may require regular doses of iron for an extended period.

While other options might have some relevance in different contexts—such as improving taste or reducing risk of choking—those benefits are not as critical as the concern over teeth staining. Transferring the liquid past the teeth helps maintain oral hygiene and preserves the appearance of the teeth during treatment.