Brad Jacobs, MD MPH
Clinical Insights
Nutrition
Emulsifiers: A gut health risk hiding in plain sight
You may be avoiding obvious junk food, but your gut may still be dealing with ingredients you would never think twice about. Emulsifiers are found in thousands of packaged foods, including many that look clean, healthy, or premium. Added to improve texture and extend shelf life, they were approved decades ago with limited long-term safety data and have largely gone unquestioned since. But emerging research suggests certain emulsifiers may disrupt the gut and contribute to inflammation. Here’s what to look for before your next grocery run.
Your gut would beg to differ
Though they aren't absorbed into the bloodstream, their presence in the gut throws our internal balance off, silently disrupting our gut microbiome and driving chronic inflammation – a root cause of many diseases. And research is increasingly linking that disruption to some of the most common chronic conditions we face today:
• Heart disease
• Diabetes
• Cancer
The research is catching up
Until recently, most of the evidence on emulsifiers came from animal studies and largely observational cohorts. That’s changing. In August 2025, researchers at KU Leuven published the first controlled randomized placebo-controlled human trial testing the effects of five common emulsifiers. They measured gut health, inflammation, and cardiometabolic markers in 60 healthy adults.
One finding stood out: participants who followed an emulsifier-free diet for two weeks saw a statistically significant drop in cholesterol levels. It’s an early signal, but a meaningful one, suggesting that eliminating emulsifier intake may have measurable benefits even in the short term.
6 emulsifiers to watch out for
Mono- and Diglycerides of Fatty Acids (E471)
Found in processed foods and margarine
Linked to 15% higher overall cancer risk, 24% higher breast cancer risk, and 46% higher prostate cancer risk. Associated with increased risk of heart disease.
Carrageenan (E407)
Found in low-fat dairy
Studies have shown a 32% higher breast cancer risk and a 3% higher type 2 diabetes risk per 100mg/day increase.
Guar Gum (E412) and Xanthan Gum (E415)
Found in sauces
Guar gum shows an 11% higher type 2 diabetes risk per 500mg/day, and xanthan gum shows an 8% higher risk per 500mg/day.
Celluloses (E460-E468)
Found in processed foods
Studies indicate a 7% increase in coronary heart disease risk.
Carboxymethylcellulose (CMC) (E466)
Found in thickener in baked goods and ice cream
Studies show a 4% increase in coronary heart disease risk.
Polysorbate 80:
Found in ice cream and dairy
Disrupts the gut microbiome, contributing to inflammation.
Empower yourself: read, choose, question
For those seeking to minimize their exposure to emulsifiers, reading food labels closely is key to finding these substances buried deeply in the ingredient list. Choose soy lecithin as a natural alternative to synthetic emulsifiers. And add emulsifiers to the long list of reasons to prioritize eating whole foods and minimizing intake of processed foods.
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A note from Dr. Brad
The gut isn't just a digestive organ—it's the foundation everything else is built on.
When we talk about emulsifiers, we're really talking about something that quietly reshapes that foundation, meal by meal, over years. Most of us don't feel that disruption happening. But chronic inflammation doesn't announce itself—it accumulates.
The good news is that the gut is also remarkably resilient—and small, consistent changes can shift that trajectory.