About David Wiss PhD
Dr. David Wiss is an independent thinker unafraid to challenge the status quo in the nutrition field. Dr. Wiss pioneered the field of nutrition for addiction recovery and is a world-renowned expert in disordered eating. His mental health research bridges gaps between neurological, psychological, behavioral, and nutritional sciences.
Dr. David has treated over 1,000 patients in the last twelve years using a food-positive functional medicine approach through his practice, Nutrition In Recovery. Dr. Wiss has developed innovative methods for using nutrition to improve mental health without feeling like a “diet.” Dr. Wiss believes gut health is the key to brain health and wants to show you how to heal yourself and help your clients.

Services
Dr. David Wiss brings his twelve years of experience as a mental health nutritionist to patients, treatment facilities, institutions, academics, and the press.
Treatment
Individual and family counseling, functional medicine, group facilitation
Consulting
Professional supervision, staff training, expert opinion/quote
Speaking
Academic conferences, podcasts, wellness workshops
Collaboration
Joint efforts on research, statistical analysis, manuscript writing
Research
With over 20 peer-reviewed journal publications, Dr. Wiss is dedicated to disseminating his findings and progressive perspectives at the intersection of nutrition and mental health.
Dietary restraint and food addiction
Food addiction cases should always be conceptualized in a psychosocial context, including life history and current mental…
Ultra-processed foods and mental health: Where do eating disorders fit into the puzzle?
Ultra-processed foods (UPFs) like pastries, packaged snacks, fast foods, and sweetened beverages have become dominant in the…
A novel weight suppression score associates with distinct eating disorder symptoms
Weight suppression has been defined as diet-induced weight loss, traditionally operationalized as the difference between one’s highest…
Training
Dr. Wiss is available to provide trainings to your staff or organization on mental health nutrition, addictions, disordered eating, and more.
Podcasts
If you would like to feature Dr. Wiss on your podcast, please send a message and we will gladly discuss a collaboration with you.
Blog
Capturing the larger systemic issues in the field, these blogs point to public health solutions. There exists great opportunity to integrate nutrition into behavioral health.
Expanding the Dialogue in Eating Disorder Treatment: A Call for Integration
Understanding Commercial Determinants of Health: Moving Beyond Social Factors
From The Socials
Are you in control of your health?
Yes and no.
There are so many factors in play in the background, that influence our habits, opportunities and access to a healthy lifestyle.
Many are aware of the social determinants of health - these are factors like race, age and level of education. All of these can impact our health, indirectly.
Have you heard of the commercial determinants of health? Explore what these are, how they influence our health, and what we can be doing about it in this mini-series.
Being informed is the first step to making meaningful change.
#CDOH #publichealth

Yesterday someone shared a post with me that said “if your dietitian supports MAHA then you need to get a new dietitian” and I been thinking about it quite a bit 🤯
The person who shared the post with me told me she was a GLP-1 dietitian (part of the “system”). I couldn’t look into it any further I already know how it goes…
Many of my dietitian colleagues are against MAHA. I would bet any amount of money that if the identical initiative was happening on the “other side” these people would support it.
It’s true, the parent organization for dietitians has been captured by corporate interests. We were trained to carry out corporate agendas. But there are more and more who see the truth and have opted out of this playbook. I never opted in to begin with.
There are also many people who support MAHA but are afraid to express it due to fear of social consequences 🫶🏼
I’m proud of myself for staying true to what I believe in. For not “changing my mind” due to social pressure and for not blowing with the wind. I stand tall in my own brand of dignity.
And I invite you to do the same ❤️

Hot off the press from @natgeo
🤔 I microwaved some rice for 3 minutes in a plastic bag the other night. I knew it wasn’t the best thing to do, but I did it anyway because we were strapped for time. I know cooking rice myself is better, but it’s not always possible. Life is filled with trade-offs.
🧠 New research shows microplastics are accumulating in our brains at alarming rates - with levels increasing 50% between 2016-2024. While scientists are still studying the health impacts, let’s focus on what we CAN do to reduce our plastic exposure:
🏠 At home:
* Ventilate rooms regularly
* Vacuum frequently to remove plastic particles
* Avoid synthetic fragrances and plastic-containing cosmetics
* Use natural fiber clothing and furnishings when possible
🛒 Shopping habits:
* Bring reusable bags
* Choose plastic-free packaging
* Skip single-use plastics
* Opt for glass/metal food storage
* Buy in bulk using your own containers
💧 Water:
* Use a quality water filter
* Avoid plastic water bottles
* Get a microfiber-catching laundry ball
* * Install a microplastic filter on washing machine
🌱 The future looks promising with scientists developing:
* Plastic-eating worms & fungi
* Advanced water filtration
* * Biodegradable alternatives
While we can’t avoid plastics entirely, small changes add up! What steps will you take to reduce plastic in your life? Share below! 🌏
#Sustainability #EnvironmentalHealth #PlasticPollution

We all have beliefs and topics that we feel so strongly about, they become the “hills we are willing to die on”.
Here are my top 4 -
1) Nutrition is a source of oppression, that furthers marginalization among already marginalized people
2) We should always look at nutritional adequacy and deficiencies before making any new psychiatric diagnoses. Many mental health illnesses can be mimicked by nutritional deficiencies.
3) Nutrition is powerful, and should be considered “mainstream medicine”
4) We need systemic changes to the healthcare system to enable significant change
What are the hot topic issues that you will never budge from??

We vote with our dollars.
Have you considered your nutrition values? This can include animal ethics, farming practices, environmental considerations, religious beliefs, and so much more. Taking inventory of your values can help you become a more informed consumer.
What are you supporting?
Value-based eating 🫶🏼

To move toward food justice we can:
1) subsidize health-promoting foods
2) regulate ultra-processed foods
3) think more about food packaging
4) promote crop diversity
5) better labor/working conditions
6) more disclosure of conflicts of interest
7) ban deceptive marketing to vulnerable populations
What else should be on this list??

There are many reasons why we think ultra processed foods are harmful to our health. Most of us look at the problematic ingredients, however have you considered the problematic packaging and processing?
The deeper we look, the more complex the issues become.
Food for thought!

We would like to think nutrition is an issue of personal choice, and in many ways it is. However, what about our institutionalized members of society?
Have you ever been hospitalized and been appalled with the limited choices on the menu? Or have you looked at the lunch options at your kids’ schools?
When we take a closer look, we quickly realize that often there are fewer choices than we would like, especially for some of our most vulnerable people. As a society, we believe we can do better!
#nutrition #upf #publichealth
