S.H., Jordan, ME.
Thanks a million for your quick/comprehensive reply and for the cogent advice/comments therein. I'm glad to inform you that I managed to find an organic protein powder.  I’m planning to add some spirulina powder to each and every shake.  As you might know I started to wean off my medicine since a while.  From tomorrow onwards I will stop my Prednisone. Imuran will be weaned of within the next week.  God bless and once again thank you very much for your advice.