Eating a lot of packaged junk food might be linked to stomach and gut problems like serious diseases or ongoing discomfort, according to studies that watch what people eat and their health.

Eating a lot of ultra-processed foods might change the bacteria in your gut, which could lead to stomach and bowel problems that cause inflammation.

Eating a lot of highly processed foods might lower the good bacteria in your gut, raise the bad ones that cause inflammation, and could lead to health problems like diabetes or heart disease.

This claim says that most of what we know about how ultra-processed foods affect gut diseases comes from population studies that observe patterns, and most of what we know about food additives comes from lab and animal tests, with very few studies directly testing these effects on humans.

Eating a lot of packaged junk food can quickly raise your blood sugar, cause long-term body swelling, and mess up your gut bacteria. This weakens your body's ability to fight off sickness and makes you more likely to get cancer.

Eating a lot of junk food might make adults more likely to feel depressed or have mental health issues, possibly because it messes with your gut and causes inflammation in your body.