Many tests are affected by medication, so you should take it after the blood draw.

If you are on iron medication, you should stop taking it 3 days before the test.

Cholesterol drops down during ovulation and iron before and during ovulation.

Smoking a cigarette stimulates the marrow and adrenal cortex. Glucose rises at 10min and the rising lasts 1 hour. Growth hormone doubles at 30min.

It is better not to smoke before the blood draw.

Blood sampling can be done at any time of the day.

No need for fasting.

On the day of the examination, the patient arrives fasting and a blood sample is taken to measure blood sugar (0΄ time).

He is then given glucose powder (in gr, prescribed by his doctor) dissolved in 1-1 1/2 glass of water.

Subsequently, blood can then be taken for the blood sugar measuring at 30΄, 60΄, 90΄, 120΄, 150΄, 180΄, and 240΄, according to the referring doctor's order.