Jun 13, 2025
Why Is My Stomach Always Upset? How Food, Additives & Environment Affect Gut Health
Why so many Americans live with gut issues, and how to start fixing them.
Health Hacks
Written by
Mito Team
Ever feel like your stomach is constantly bloated after meals, have random cramps, or run to the bathroom too often? Upset stomach and gut discomfort are incredibly common. But here's a thought: maybe your gut isn't the real problem. Perhaps it's your environment.
Instead of blaming our bodies, it might be time to ask: What are we putting in our bodies every day? From heavily processed meals to sneaky food additives, the way we eat and live in the U.S. can do a number on our digestive health.
Ultra-Processed Foods and the Modern Gut
One major issue? The modern American diet. It’s full of ultra-processed foods, like boxed snacks, fast food, and frozen meals. Sure, they’re convenient, but they’re also loaded with stuff your gut wasn’t designed to handle.
A 2019 study shows these foods are linked to obesity, diabetes, and heart disease. But they also mess with your gut microbiome, which keeps your digestion and overall health running smoothly. When you disrupt that balance, mild bloating and chronic gut inflammation may happen.
So, What’s Hiding in Your Food?
A large part of the problem isn’t just what these foods are lacking, like fiber and nutrients—it’s what they’re full of: additives. We’re talking emulsifiers, gums, preservatives, and artificial sweeteners. Some of these are banned in other countries but are still widely used in the U.S.
A 2024 study revealed that common emulsifiers, such as polysorbate 80 and CMC, damage the gut barrier and alter the gut bacteria in harmful ways. That damage leads to bloating, stomach cramps, diarrhea, and long-term inflammation.
There’s also the increasing rates of inflammatory bowel disease (IBD) in Western countries, which are linked to urban living, a lower intake of fiber in diets, and a higher consumption of processed foods. Even early exposure to food additives and dietary emulsifiers harms how the gut barrier works and affects immune development, especially in children.
So if you’re wondering, “Can food additives cause bloating?”—the answer is likely yes.
Why Your Gut Feels Better Abroad
Maybe you’ve also noticed this: your gut feels better and you experience fewer stomach issues when you eat fresher, less processed foods in countries with stricter food regulations. For example, Europe bans many additives allowed in the U.S.
The environment you live in—your food supply, stress levels, even how much you move—directly affects your gut. A 2024 study found that stress and lack of sleep make your gut more permeable and throw off the balance of your gut bacteria.
That means your bloating or upset stomach may be less about your biology and more about your zip code.
Common Signs Your Gut’s Reacting to Your Environment
Your gut might be telling you something if you notice:
Frequent gas or stomach aches
Bloating that comes and goes
Bathroom habits that vary daily
Feeling better when you leave your usual environment
These are often labeled as “IBS” and pushed aside. But they’re real signs of gut microbiome imbalance and low-grade gut inflammation. You don’t have to live with them.
How to Fix Gut Health the Smarter Way
Instead of reaching for random stomach relief pills or scrolling through endless lists of upset stomach remedies, start with the basics.
1. Test, don’t guess
Take a gut health blood test to check for systemic inflammation and key immune markers. Add a stool test to measure the microbial diversity, digestive enzyme activity, and gut inflammation markers.
Look for inflammation markers in blood that could be tied to chronic gut stress or food triggers. Mito Health offers a comprehensive blood panel for inflammation and advanced tests like the Celiac Disease Screen and more.
2. Rethink what you eat
Cut back on ultra-processed food for your gut health. These are major contributors to gut microbiome imbalance.
Food additives and gut health don’t mix well. So, watch for ingredients in your food like emulsifiers and gums. Build meals around fiber-rich plants, fermented foods, and lean proteins to nourish beneficial gut bacteria.
3. Support digestion naturally
Consider adding supplements to your healthy gut routine, such as magnesium, zinc, or digestive enzymes, especially if you’re experiencing stomach cramps, bloating, or irregular bowel movements.
Manage stress and improve sleep—they’re both huge for gut healing. Move your body daily. Even a short walk can help regulate digestion.
4. Monitor and adjust
Track how you feel after meals. Are your IBS symptoms and diet linked? Stay consistent with changes and retest when needed to measure progress.
What Your Gut’s Been Trying to Tell You
Your gut isn’t broken. But your food, your stress levels, and your environment might be throwing it out of balance.
If you’re struggling with gut issues like an upset stomach, unpredictable digestion, or food sensitivities, don’t just treat the symptoms. Let Mito Health help you stop guessing and start getting better. Check out Mito Health’s blood testing offers today.