Jews will take hormones and serums produced by pigs and horses.
I had a Muslim co-worker, Hamid. I invited Hamid over for a dinner party. Know what? He couldn't touch most of my food because it wasn't KOSHER! Hamid said that the Muslim dietary law was very similar, if not exact, to the Jewish laws. He could eat at a Jewish house, and he bought his lunch from a Kosher deli.
I know the Muslims and Jewish people fight alot, but they are very similar. No wonder, they were brothers .... long before Christ. And, it shows in their shared food table.
When I started looking into this, I spoke with a about 4 Jewish Rabbi's, a Kosher Board, Jewish doctors, a Muslim medical doctor who is an expert on applying Islam to medical ethics and speaks around the world.
My conclusion was that the WTs does not take these scriptures into context. I also don't think the WTS believes its own doctrine anymore (since it allows fractions, current therapy, etc.); but doesn't know how to change it without upsetting the whole applecart.