How Does Food Affect How We Feel?

Jul 12, 2019

Reading time: 4 Minutes

Unhealthy fast food

By Laura Bollinger, RDN


The pressure is on, deadlines are looming, and stress levels are nearly maxed out. Cue the pizza order, drive-thru stop, or late night run for ice cream.


We’ve likely all been there, whether it's work stress, school assignments, or a meeting gone horribly wrong, we get stressed or frustrated and reach for high-calorie, unhealthy foods. But does what we put in our mouths really affect how we actually feel?


Unhealthy fast food


That might seem like a silly question, but consider some of the reasons we choose the foods we eat. Is it a comfort food? Is it a craving? Ever felt “hangry?” All of these are more emotional reasons for eating. With that in mind, consider how you might feel differently if you changed the foods you ate.




Sugary, sweet desserts or salty fries are some foods that cause a reaction in the brain reward center similar to the reaction seen with drug addiction. While these foods may make us feel good momentarily, their effects wear off quickly and may leave us feeling even worse.


On the other hand, some foods are more likely to boost your mood long-term than others. Recent research from Australia found that those consuming more fruits and vegetables had higher levels of happiness, life satisfaction, and well-being.


Building on this idea, plant-based diets have been associated with improved mood, lower rates of depression, and higher life satisfaction scores. This is likely due to a variety of factors including high levels of antioxidants found in fruits and vegetables. Additionally, nutritional deficiencies including vitamin B12, folate, and zinc can cause depression symptoms, so a diet rich in plant foods that contain these nutrients may correct these deficiencies and reduce symptoms.


Other important nutrients for brain health are omega-3 fatty acids, docosahexaenoic acid (DHA), and eicosapentaenoic acid (EPA). EPA in particular has been shown to reduce symptoms of depression. Foods rich in omega-3s include flaxseeds, walnuts, leafy greens, and fatty fish.


Mental Health


While mental health isn’t strictly linked to diet, it certainly plays a role. Multiple nutrient deficiencies can disrupt neurological function. However, more than any single nutrient, our overall eating habits are strongly linked to how we feel.


Our Standard American Diet (SAD) is full of highly processed foods, which is greatly associated with increased risk of depression, mild cognitive impairment, and attention deficit hyperactivity disorder (ADHD). Conversely, a “whole foods” style diet is correlated with reduced risk of depressions and other mental illnesses.


Gut Health and Feelings


Did you know that 90% of our serotonin receptors are located in our gut, not our brains? Gut health and the human microbiome (or gut environment) have become the focus of a fairly new field of study, nutritional psychiatry. Nutritional psychiatry aims to understand the link between what we eat and how we feel.


Woman not feeling well


Our microbiome is made of up billions of bacteria. Keeping this bacteria healthy is important. Not only do “good” bacteria protect the lining of our intestines, but they also protect us from “bad” bacteria, limit inflammation, and impact neural pathways between the gut and the brain.


Knowing that what we eat impacts brain function and mood means we need to take good care of our gut. Whole food, plant-based styles of eating, such as a traditional Mediterranean or Japanese diet, have been found to reduce rates of depression. Researchers believe this is due to the high level of unprocessed foods. The high amount of fiber found in unprocessed foods is used by the bacteria in the gut as fuel, keeping them healthy.




Inflammation is another factor that affects how we feel and can lead to some of the major chronic diseases we face including heart disease, cancer, and neurodegenerative diseases. The foods we eat, among other things, influence inflammation in our bodies.


A recent review of available research found that vegetarian style eating produced lower levels of inflammatory markers when compared with non-vegetarian eaters. Recall that fruits and vegetables are rich sources of antioxidants, and these antioxidants fight inflammation.


Conversely, diets high in sugar-sweetened beverages, refined grains, red meat, and diet soda were associated with higher levels of inflammation.  So not only can plant forward meals help us feel better now, they can also help prevent chronic health conditions in the future!




While you may not feel bad on your current diet, I challenge you to try removing processed foods from your diet for a few weeks. Stick to vegetables, fruits, legumes, unprocessed grains, nuts, and seeds with modest amounts of lean meats, fish, and dairy. Take note of how you feel. Then gradually add some of your favorite processed foods back into your meal plan and see if you feel different.


For recipes and nutrition plans, visit our Wellness Library. If you’re a Medi-Share member and still unsure or need guidance, contact one of our health coaches to get started on a path to a healthier, happier you.

Subscribe To The Blog

Subscribers get all of Medi-Share's most recent and relevant content conveniently emailed to them once a week. Sign up today!

Follow Us

Medi-Share Is A Community Of Like-Minded Christians

Medi-Share is an innovative health care solution for Christians looking to save money without sacrificing on quality.