As the description says, this works more on the facial muscles. As this field gives those muscles a workout, might you lose face fat? Maybe some, but that’s not the real focus of this field.
You might be interested in this thread:
Reducing Facial Fat
As you can see from that thread, at least 1 forum friend got a stronger jawline from using the Fat to Stem Cell audio.
There’s also the New Release - Face Lift and Facial Toning Ver 2.0 field that would be more focused towards your goal.