My girlfriend says they are usually wheat or soy based, but may actually contain animal products too. Those hard, chewy, spicy things that are kind of like meat are apparently made from flour.

But don't believe what she says. It's soylent green.

My wife says it's flour. I feel like it's some kind of horrible fish without taste.

Tree bark.

Rubber, plastic, hemp, you name it, you probably ate it.

if it tastes good and you like it, best not to think about it

The process is by using a meat emulsifier, the same process used to make weiners from unused meat products. This grinds everything into a paste which include underwear and running shoes that the guys in the plant throw in. It comes out green and must be died red.

 In China there are even less unused meat products to use so more underwear and running shoes go into the mix. TIC

I did a story about vegetarian restaurants for eChinacities a few years ago. Many of the restaurants I went to said it was mostly tofu.