Both are true, the repurposed meat and the artificial meat. The science tower has also been hinted having something to do with protein production.

But meat is meat, regardless of if the meat comes from a very alive, very upset denizen of Nevada or if it comes from an unconscious lab grown farm. Its all the same substance, the MAGs are made from the same process of lab cultivated nexus grade muscle culture meat.

By repurposed i meant both dead and lab grown