I was looking up the rules for Halal food, because I was cooking for a Muslim student of mine. One of the things I found online was frequent questions, from Muslims, along the lines of the title of this post.
This just goes to show how deeply scientism has infected the entire world culture. Why in the world would some religious dietary restrictions need a "scientific" basis? Isn't the fact "God told us not to eat this" enough?
And if you're eating a certain way because you're convinced of the health effects of eating that way, than you are no longer doing it for a religious purpose!