How often should I have this test?
For most people it would be beneficial to have these parameters checked annually. Your GP is the best person to determine whether you need additional tests, or more frequent testing, depending on your health status and individual needs.
These tests are also useful for determining whether you require vitamin or mineral supplements, and to monitor your response to nutritional supplementation.
Dr Daniel Fenton is the Clinical Director at the walk-in GP clinic, London Doctors Clinic, part of the Doctors Clinic Group.