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Gratitude Physically Changes Your Brain, Neuroscience Shows

Jessica Stillman
3 min readNov 21, 2023

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Fad diets aside, we all know the basic formula for greater physical health — eat less junk and exercise more. The same can be said for greater happiness. Sure, mental health is hugely complex, but the research on how to promote basic, day-to-day well-being couldn’t be clearer — just cultivate gratitude.

“Something as simple as writing down three things you’re grateful for every day for 21 days in a row significantly increases your level of optimism, and it holds for the next six months. The research is amazing,” Harvard researcher and author Shawn Achor has told Inc.com. Other studies show gratitude increases willpower, helps keep you calm, and can even boost employee morale.

All of which is both interesting and useful (and seasonal), but it begs the question: Why is simply paying attention to the good things in your life so powerful? Brain imaging studies have investigated this question with fascinating results.

This is your brain on gratitude.

For one recent study, a team of researchers out of Indiana University led by Prathik Kini recruited 43 subjects suffering from anxiety or depression. Half of this group were assigned a simple gratitude exercise — writing letters of thanks to people in their lives — and three months later all 43 underwent…

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