Why does a carton of heavy cream last for 2 months in the refrigerator, but a carton of milk only lasts for about 1 week before expiration?

Question

Why does a carton of heavy cream last for 2 months in the refrigerator, but a carton of milk only lasts for about 1 week before expiration?

In: 6468

Answer 1

Live-culture buttermilk lasts forever in the fridge. I’ve had half-gallon jugs last for months and months. Why exactly is this? Is live-culture yogurt like this?