Gratitude Really Is Good for You. Here’s What the Science Shows.

In 2022, Stacy Batten said, her “whole year was on fire.”

Her husband died of cancer, and her father died after a long battle with Parkinson’s disease. Her mother was diagnosed with cancer. And she moved across the country from Seattle to Fairfield County, Conn., after selling the home that she had lived in for 26 years.

In her devastation, she noticed that she felt better when she looked for the good parts of each day. So she took a large Mason jar and turned it into a “gratitude jar,” which she now keeps on her night stand.

Every night, she writes down a few things that she is grateful for on a scrap of paper and drops it inside. They are often as simple as “I met a new neighbor” or “I took a walk with the dog and my mom.”

“The grief is still there,” Batten, 56, said. “But writing those daily notes has helped.”

Two decades ago, a landmark study led by the psychologist Robert A. Emmons sought to understand how people benefit from gratitude, a question that scientists had rarely explored until then.

Dr. Emmons’s findings — which suggested that gratitude may improve psychological well-being — inspired a spate of additional research. To date, numerous studies have found that having a grateful outlook, “counting one’s blessings” and expressing gratitude to others can have positive effects on our emotional health as well as on interpersonal and romantic relationships.

In addition, some studies, but not all, have shown that gratitude can benefit physical health.

“Gratitude heals, energizes and changes lives,” Dr. Emmons said. “It is the prism through which we view life in terms of gifts, givers, goodness and grace.”