how does your body know.....

how does your body know to stop losing when you have reached your goal? i am so afraid i will get to my goal 120 and not be able to stop losing.

It doesn't.

In all my years in the bariatric community, I've only known of a handful of people who were still too thin at the 3 year mark. The bigger worry should be regaining after you get to goal. Far many more people struggle with that.

Your body doesn't know what your goal is.  It doesn't just stop losing when you reach some number on the scale.

Your body stops losing when you begin to take in the same number of calories you burn in a day.

thank you all for your responses.

I was just curious as to how to stop losing when i got to the goal weight. thanks for explaining it to me.

Well, in 9 years, I've never heard of anyone disappearing

I'm with Laura - I've seen very few people who lose beyond the lower end of their normal BMI - and most of us are fighting regain for the rest of our lives.  

Just let your body do it's thing - chances are you'll be absolutely fine!  (Most people I have seen who try to "manage" maintenance and not losing any more by altering their diet/exercise have posted a year or less later that they have regained some)