I was low on Hemoglobin going into chemo after surgery to remove colon cancer. My Oncologist wanted me to eat foods containing iron to bring the level back up vs take an iron pill. I used to frequent the Livestrong site during chemo to work on eating whatever I needed to to bring up whatever blood level was low after the prior chemo.
http://www.livestrong.com/article/349946-foods-to-eat-to-increase-red-blood-cells/

http://www.livestrong.com/article/17407-increase-white-blood-cells/

http://www.livestrong.com/article/536916-nutrition-to-boost-platelet-count/

http://www.livestrong.com/increase-hemoglobin/