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Food and Mood: How Nutrition Supports Your Mental Health
What you eat affects how you feel. A practical, non-diet guide to nutrition, the gut-brain connection, and mood.
Earl Johns, MSN, PMHNP-BC
Board-certified psychiatric nurse practitioner and founder of Wellthy Psychiatry & Wellness
✓ Medically reviewed by Earl Johns, MSN, PMHNP-BC
Photos are illustrative and don’t show actual patients.
Food isn’t a cure for depression or anxiety, but it’s one of the building blocks of a steady mood. The field of nutritional psychiatry looks at how what we eat affects the brain, and the findings point toward simple, flexible habits rather than strict diets.
The gut-brain connection
Your gut and brain talk constantly through nerves, hormones and the immune system. The trillions of bacteria in your gut help produce chemicals that influence mood and inflammation. Diets rich in fiber and varied plant foods support a healthier gut environment.
Patterns linked with better mood
Mediterranean-style eating, with plenty of vegetables, fruits, whole grains, beans, nuts, olive oil and fish, is linked with lower rates of depression. One clinical trial found that people with depression who improved their diet in this direction saw meaningful improvement in symptoms.
Omega-3 fats from fish like salmon and sardines, or from walnuts and flaxseed, support brain health. Fermented foods like yogurt, kimchi and kefir may support gut health.
Things that can make mood harder
Skipping meals can lead to blood sugar dips that feel a lot like anxiety: shakiness, irritability and trouble focusing. A lot of caffeine can worsen anxiety and sleep. Diets very high in ultra-processed foods and added sugar are linked with higher depression risk. Alcohol is a depressant and disrupts sleep, even when it feels relaxing in the moment.
A note on diet culture
In parts of the gay community there can be heavy pressure to stay very lean. Rigid rules, cutting whole food groups, or feeling guilt after eating can harm both your mental and physical health. Food is also connection, culture and pleasure. A healthy relationship with food includes all of that.
Easy places to start
Eat something within a couple of hours of waking. Add one extra vegetable or fruit a day. Keep easy protein on hand, like eggs, beans, Greek yogurt or nuts. Drink water through the day. Notice how different foods leave you feeling a few hours later.
When to get more support
If eating feels out of control, you’re restricting heavily, or thoughts about food and your body take up much of your day, please talk to a clinician. Some medications also affect appetite and weight, and your prescriber can help you manage that.
A gentle next step
Wellthy Psychiatry offers judgment-free, LGBTQ+ affirming care by telehealth across California. A free 15-minute phone consult is an easy way to see if we’re a good fit.
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. His background includes inpatient psychiatry and community mental health at Glenn County Behavioral Health and Equity Health, a federally qualified health center. He sees clients in San Francisco and by telehealth across California.
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