Woah there. We're not fighting each other for dear life. This is just academic discussion. No need to be so defensive.
It was in a thing I read once. I don't remember specifics, it was many years ago and I didn't save it. It had to do with raising rats in microgravity, and in spinning centrifuges that could simulate the gravity on the Moon and Mars.
The thing about metal availability comes from something Robert Zubrin wrote. I don't know what he bases it on but I consider him an authority on the topic of Mars colonization.
It sounds like you are just very passionate for a Moon base. I didn't mean to diminish or step on that dream. No doubt there will one day be manned bases on the Moon.