So I went to go donate blood the first time I donated whole blood . Now they are telling me there is procedure for platelets and one for red blood cells . The red blood cell one takes out 2 units of blood instead of the whole blood which only takes 1 unit . Would it be best to donate red blood cells instead of whole units since they take out 2 units when u donate red blood cells vs whole blood is 1 unit ? They also told me I have a high platelet count will that do any harm or they just trying to take my platelets ?