[throwawaycities]

That’s the point, the yogurt purchased in stores is processed to the point it loses the very benefits that make yogurt “healthy.”

To answer your specific question, farmers that have dairy cows. It’s not so common these days, but neither is healthy yogurt. Another example of a probiotic food would be kimchi, which in the US most people probably purchase in stores (pasteurized), but in SKorea many make at home so it’s raw with naturally occurring cultures and enzymes.