"The Happiness of Stress-Free Individuals: Exploring the Link Between Stress and Well-Being"

TL;DR
A study on stress-free individuals found that while they reported higher levels of happiness and lower levels of chronic health issues, they also displayed signs of cognitive decline. The research suggests that some level of stress is necessary for optimal brain function and learning, and that not all stressors are negative. The study also revealed that social interactions play a complex role in stress, with a sweet spot for ideal social support that keeps individuals thriving cognitively.
Some people don't experience stress. Are they happier? National Geographic
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