First, a quick science snack. Probiotics are live beneficial bacteria, the little heroes in your gut that help digestion and immunity. Yogurt is their most famous delivery vehicle—think of it as a tiny, tangy Uber for these microbes.
Here’s the short answer: Freezing does not kill all probiotics, but it can reduce their numbers. Most probiotic strains enter a state of suspended animation when frozen, like a microscopic hibernation. Once thawed, many wake up and get back to work, though some delicate strains may not survive the journey.
A 2018 study in the Journal of Dairy Science found that while freezing cuts probiotic counts by about 30 to 50 percent, the survivors remain viable for weeks. So your frozen yogurt isn’t a probiotic graveyard—it’s more like a chilly sleepover.
