| Obligatory | Must not donate if: On prescribed medication to treat a deficiency. |
| Discretionary | If on oral self-medication or prescribed treatment to prevent deficiency, accept. |
| Additional Information | People who are on treatment for a vitamin deficiency should not donate even if they pass the haemoglobin-screening test. Once treatment is completed they should be accepted or excluded on the basis of the underlying condition that required treatment. Vitamins are often prescribed to prevent deficiency. This might be for coeliac disease or for people wanting to conceive. Providing any underlying condition is not a reason to exclude, the donor should be accepted. |