Industrial loaf fabricators categorise ascorbic acid as a flour ‘improver’ or dough conditioner. In the presence of oxygen, ascorbic acid becomes an oxidising agent and the ‘improvements’ to which it contributes include:
Strengthened gluten
Greater loaf volume
Finer crumb (i.e. smaller, more even cells/bubbles)
Increased tenderness of the crumb
Reduced crust thickness
Faster rising