The JW that gave the talk on fractions is my old local area didn't know fractions came from blood donations but assumed they were 'made in a lab'.
Haha! He was probably home-schooled. (My go-to line for any ignorant comment a JW makes.)
But seriously, this topic ranks up with the topic of education in that it makes me so steaming mad! I had a pretty heated conversation about this with my mother one time. I told her how incredibly hypocrital it is for Witnesses to permit blood fractions and medicines that are made from blood fractions,but they do not allow their members to donate. She didn't even know you could donate just plasma. Long story short ... I won the argument, but it didn't change her viewpoint on it. She just never brings it up anymore.
As an FYI to anyone to wants to share with their Witness families: http://www.redcrossblood.org/donating-blood/types-donations/plasma-donation