Hi S001,
You know when your dad's platelets can be as low as 23 he has to be very careful and try to avoid everything that eventually could decrease the platelets

. Here is a "warning list":
http://www.pdsa.org/about-itp/warnings.html
I got the original article about cows milk and only adults with colitis and infants with cow milk allegy got low platelets after drinking cow's milk.
Kind regards
Birgitta-A
71 yo, dx MDS Interm-1 May 2006, transfusion dependent, Neupogen 2 injections/week for low white blood cells, Desferal and Exjade for iron overload, asymptomatic