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Epsilon cell
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<p>Epsilon cells (ε-cells) are one of the five types of <a href="/facts/Endocrine/PDvN5cpj">endocrine</a> <a href="/facts/Cell_(biology)/bLM9UQvy">cells</a> found in regions of the <a href="/facts/Pancreas/r0WPGjAq">pancreas</a> called <a href="/facts/Islets_of_Langerhans/PJVtM7MY">Islets of Langerhans</a>. Epsilon cells produce the hormone <a href="/facts/Ghrelin/0uWqCQsX">ghrelin</a> that induces hunger. They were first discovered in mice. In humans, these cells compose less than 1% of all islet cells. They are connected by <a href="/facts/Tight_junction/CXxxM5H5">tight junctions</a> that allow impermeability to water-soluble compounds. </p>