Ghrelin: Neurotransmitter/hormone involved in reward and compulsive behaviors involving drugs and natural rewards. (L) means lay article about a study
Ghrelin
![ghrelin](https://www.yourbrainonporn.com/wp-content/uploads/2020/08/nerves-2926087_1920-1024x683.jpg)
Ghrelin: Neurotransmitter/hormone involved in reward and compulsive behaviors involving drugs and natural rewards. (L) means lay article about a study