https://www.selleckchem.com/products/syrosingopine-su-3118.html Providing emotional support was associated with higher same-day negative affect, more stressors, more positive events, and elevated physical symptoms. Compared to younger and middle-aged adults, older adults experienced less of an increase in stressors and positive events (NSDE II) and negative affect (NSDE Refresher) on days when they provided more emotional support than usual. These findings demonstrate that prosocial activities are associated with both costs (negative affect, stressors, physical symptoms) and benefits (positive events) for same-day well-being. Older age may protect against negative ramifications associated with prosocial activities. (PsycInfo Database Record (c) 2021 APA, all rights reserved).Prosociality (i.e., voluntary thoughts and actions intended to benefit somebody else) is arguably essential for positive social relationships. The present research investigated under what conditions a prosocial focus has positive effects on the subjective well-being of a prosocial person. We addressed this question in an intervention study of daily social interactions. All participants (N = 295, 57.6% women, age 19-88 years) started the study with a baseline day with no intervention. Participants then underwent a video-based intervention that trained them to focus on either the well-being of others or the well-being of themselves. Participants applied the corresponding focus in social interactions on the next day. Compared with baseline, focusing on others did not significantly affect subjective well-being, whereas focusing on self significantly reduced subjective well-being (the latter effect was further moderated by age and relationship closeness). The difference between self- and other focus was moderated by age Younger participants (68 years) showed the opposite effect (there was no difference in the middle-aged adults). Taken together, the results suggest that focusing on a social partner i