> the concentration of red blood cells and platelets is not affected by what you had for lunch Sure. Except I never said or meant to imply RBC's and platelets

> the concentration of red blood cells and platelets is not affected by what you had for lunch Sure. Except I never said or meant to imply RBC's and platelets change on the same day. Part of the context of the comment, were my own tests. So the question is, why wouldn't one want to remove as many confounding factors as possible?