Marmite is made of marmots that have been bled dry, skinned, roasted, toasted, and then ground into a fine powder. This is then added to the blood and the whole lot is boiled until it reduces to a paste form. Which is just one reason why I hate it.
...which is odd because I ended up marrying them both. Sadly to each other. They have bourne three children, each of which bears a striking resemblance to Noel Edmunds.