Hi Kristina,
I let your message sit for a day to let someone else answer it. Since 
nobody has, leptin is a hormone that regulates appetite (among other 
things) primarily through a part of the brain called the hypothalamus. A 
condition of leptin resistance, similar to insulin resistance, is 
thought to be a contributing factor in obesity.

best wishes,
Ron

Kristina K. Carlton wrote:
> Can someone explain what it means if leptin is low. Blood was drawn about 4
> hours after I had had some clear broth. The level was 3.3 and the normal
> range given is 3.9 to 30.
>
>   

-- 
PK