The amount is tiny though. I make my own bread, and you can use just half a teaspoon in a loaf, it's just to get the yeast going, and they probably metabolise

The amount is tiny though. I make my own bread, and you can use just half a teaspoon in a loaf, it's just to get the yeast going, and they probably metabolise most of it. I've also experimented with using part milk so they use the lactose instead, and this also gives a nice consistency to the bread (still working on further improving this though!)