The term "allostasis" has been coined to clarify ambiguities associated with the word "stress". Allostasis refers to the adaptive processes that maintain homeostasis through the production of mediators such as adrenalin, cortisol and other chemical messengers. These mediators of the stress response promote adaptation in the aftermath of acute stress, but they also contribute to allostatic overl...

Among social network sites (SNS), Instagram has become one of the most important platforms for adolescents (age 10–19 years), especially in Germany. They use it to share experiences and meaningful content above all, interact with their peers. Norms, defined by peer group, influence adolescents’ behavior, online as much offline. This on aligning one’s needs expectations SNS environment leads pre...