ACTH 4-11, a fragment of the adrenocorticotropic hormone, is primarily studied for its potential cognitive-enhancing effects. Research suggests it may improve memory and learning abilities, making it a subject of interest in neuroscience and psychology. It is also explored for its role in reducing stress and anxiety, potentially offering therapeutic benefits for mental health conditions. Additionally, ACTH 4-11 is being investigated for its effects on skin pigmentation and its possible use in treating certain dermatological disorders. Its applications remain largely experimental, with ongoing studies to fully understand its mechanisms and potential uses.