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The Science of Gratitude

November 1, 2025

by Marcy Valetutti

How has constant stimulation, stress, and striving to achieve at every level so quickly become the norm for so many? I’ve been reflecting on this very thought after a recent question from my young daughter about what my cell phone looked like when I was little. My answer of “they didn’t exist” was met with shock, awe, and “How did you contact people? What if you needed something or someone? What was it like?” Her innocent wonder had me thinking about how much our world has changed, how rarely we seem to pause, and how easy it is to fill every quiet moment with noise or urgency. Yet even as the world evolves, the essence of being human (our need for connection, reflection, and meaning) remains constant. Gratitude is one of the most beautiful ways to reconnect with presence, wholeness, and soften the edges of modern life.

What is Gratitude?

Psychologists describe gratitude as both an emotion and a trait: something we can experience in the moment and also cultivate as an enduring habit. Robert Emmons, a leading researcher on gratitude, defines it as “an affirmation of goodness in our lives and a recognition that this goodness comes from sources outside ourselves.” It is both seeing the gifts around us while also understanding that these gifts are often linked to others, whether it be nature, other people, or circumstances.

How Gratitude Affects Our Brain & Body

Our emotional state is not just “in our head.” Our emotions can produce biochemical events that ripple through every cell of our body, influencing hormones, inflammation, immunity, cardiovascular function, and even gene expression. Over the last two decades, studies in neuroscience, psychoneuroimmunology, and positive psychology have revealed that gratitude is a powerful physiological state that creates measurable changes in the brain and body:
  • Neural Effects – Feeling or expressing gratitude activates areas of the brain linked to joy, empathy, and connection, including the prefrontal cortex and reward centers. These neural patterns mirror those seen in mindfulness and compassion, promoting calm and emotional balance.
  • Stress & Inflammation – A 2021 study published in Brain, Behavior, and Immunity found that individuals who practiced gratitude showed reduced inflammatory markers and lower amygdala reactivity. Cultivating gratitude may help buffer our responses to stress, lowering cortisol and supporting immune function.
  • Cardiovascular & Physical Health – Multiple studies have linked gratitude with lower blood pressure, better heart-rate variability, and improved sleep quality. On in particular showed that participants who kept gratitude journals reported exercising more and experiencing fewer physical symptoms than control group. Our hearts quite literally thrive on thankfulness.
  • Mental & Relational Health – On an emotional level, gratitude has been associated with greater happiness, lower depression and anxiety, and stronger relationships. In brain-imaging terms, this makes sense: gratitude activates the same reward circuitry that generate connection and trust.

How to Build a Gratitude Practice

Here are a few science-supported ideas to help consciously weave gratitude into our daily lives:
  1. Keep a Gratitude Journal – Write down three things you are grateful for at the end of each day. Include why each one matters and what it reveals about your life. Studies show that writing regularly strengthens the brain’s positivity bias, and improves sleep and mood over time.
  2. Send a Letter – Write a note to someone who has positively impacted your life. Research from the University of Pennsylvania found that participants who wrote gratitude letters experienced measurable increases in happiness and life satisfaction, even weeks later.
  3. Mindful Gratitude Reflection - Take 1-2 minutes during your day to consciously notice something good. Close your eyes, breathe deeply, and let yourself feel appreciation in your body. Notice warmth, relaxation, or calm expanding as you focus on the moment.
  4. The “Three Good Things” Practice - This is a family favorite of ours that we do with our daughter before bed. Each night, recall three good things that happened during your day and what caused them. This trains your brain to notice supportive patterns in your life, counteracting the natural negativity bias that drives stress.
  5. Gratitude in Motion - Bring gratitude into movement: during yoga, walking, or stretching, focus on being thankful for your body’s capacity to move and heal. Combining physical awareness with gratitude enhances body–mind integration and reinforces self-care as an act of appreciation.
Gratitude is more than a fleeting feeling of appreciation and emotional warmth. It is a biological state that fosters balance, connection, and healing throughout the body. While November naturally invites us to give thanks as we gather for Thanksgiving, true gratitude extends far beyond a single season. It is not just as a response to what’s going well, but an intentional habit that helps you recognize the support, beauty, and abundance already present in your life, all year long.
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