GMB: Richard Madeley says he has a 'routine medical'
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If you’re having a fasting blood test, you will be told not to eat or drink anything other than water beforehand. You may also be told not to smoke before your test, according to the NHS. Richard Madeley said he was going for a routine medical, so needed to fast before going for tests. The health body also lists examples of blood tests that may require you to fast. For a fasting blood glucose test you may be asked to fast for eight to 10 hours before the test. To have an iron blood test you may be asked to fast for 12 hours before the test.
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