Why does bread go stale?
Quick Answer
Bread goes stale mainly because its starch recrystallises (retrogradation), squeezing water out of the gel structure — not simply because it dries out.
The Full Story
When bread bakes, heat and water cause starch granules to swell and form a soft gel. As the loaf cools and ages, starch molecules — especially amylopectin — slowly realign into rigid crystals, a process called retrogradation. This pushes moisture out of the starch and makes the crumb firm and crumbly, while the crust turns leathery as it absorbs moisture from inside. Staling happens fastest at refrigerator temperatures, so bread in the fridge goes stale quicker than bread at room temperature. Gently reheating stale bread can temporarily reverse the process by melting the starch crystals again.
Key Facts
YouTube Angle
Suggested video title for this topic:
"Two loaves, one fridge, one bread bin — which goes stale first? The answer surprises most people."