If a person snacks or eats more when he is stressed out, then acupuncture
might lower stress
and decrease eating.
If he is at the acupuncture clinic, then he is not at the grocery store, the bar, or the restaurant, so he may be eating fewer calories. However, if he eats the same or more calories after starting acupuncture as before, then he will probably have no weight change or get even heavier.