Nutrition and mood: what the research says
How food affects mental health, simple eating habits that support mood, and where supplements fit.
Earl Johns, MSN, PMHNP-BC
Board-certified psychiatric nurse practitioner and founder of Wellthy Psychiatry & Wellness
✓ Medically reviewed by Earl Johns, MSN, PMHNP-BC
What you eat won’t replace therapy or medication, but it can support steadier mood and energy. Here’s what the research suggests.
The gut-brain connection
Your gut and brain talk constantly through nerves, hormones and the immune system. A varied, fiber-rich diet supports healthy gut bacteria, which may influence mood.
Patterns that help
Diets rich in vegetables, fruit, whole grains, beans, fish and olive oil, like the Mediterranean diet, are linked to lower rates of depression.
Steady blood sugar
Skipping meals or relying on sugar and caffeine can lead to energy crashes, irritability and anxiety. Regular meals with protein and fiber help keep things steady.
Where supplements fit
Some people benefit from omega-3s, vitamin D or B vitamins, especially when labs show low levels. Always check with your provider about interactions first.
A gentle next step
A free 15-minute phone consult is an easy way to see if Wellthy Psychiatry feels like the right fit for you.
This article is for general education and isn’t medical advice. If you’re in crisis, call or text 988, the Suicide & Crisis Lifeline, or call 911.
About the author
Earl Johns, MSN, PMHNP-BC
Board-certified psychiatric nurse practitioner · UCSF-trained · Founder of Wellthy Psychiatry & Wellness
Earl provides LGBTQ+ and neurodivergent-affirming psychiatric care, blending medication management, therapy and whole-person approaches. He sees clients in San Francisco and by telehealth across California.
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