Epsilon cells (ε-cells) are pancreatic cells that release ghrelin, a hormone that stimulates appetite, increases fat storage, and stimulates the growth hormone release from the pituitary gland.
Unit 3,
Reference: Shahid Z, Singh G. Physiology, Islets of Langerhans. In: StatPearls. Treasure Island (FL): StatPearls Publishing; October 3, 2022.