Yes, ultra-filtered milk is pasteurized. Myth: The purpose of heating milk to 180˚F before incubation is to kill all bacteria. Truth: According to Brod and Taylor, heating milk before incubating yogurt (never boil) removes the handcuffs from certain proteins enabling them to join the yogurt party. The more, the merrier when you want thick yogurt. So yes. Heating ultrafiltered milk to 180˚F is unnecessary when making yogurt. But it's still completely safe.