The common food preservative linked to diabetes development

More than 400 million people worldwide suffer from diabetes, and the rate at which people are developing this disease is accelerating. The surging rates of diabetes and obesity in the last 50 years strongly argue that environmental and dietary — rather than genetic — factors are driving this type 2 epidemic.

A new study suggests that one of the culprits may be a common food additive, propionate.

Propionate is a natural substance that is added to various processed foods as a preservative to prevent mold and bacterial growth. It is generally regarded as safe (GRAS) according to the Food and Drug Administration and is a common additive in our food supply. Here’s a list of some of the foods in which propionate may be found:

  • Baked goods (think bread, pastries, pizza dough)
  • Breakfast cereals
  • Pasta and noodles
  • Dried and condensed milk
  • Processed cheeses
  • Flavored yogurts and puddings
  • Dairy-based spreads
  • Sports drinks
  • Diet foods and beverages
  • Commercially prepared potato salad
  • Condiments
  • Soups and sauces
  • Nut butters

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Now, researchers at Harvard are raising a warning flag about this additive. As it turns out the preservative may be a metabolic disruptor, disproportionately increasing the levels of several hormones that are associated with the risk of obesity and diabetes.

And not with extreme dosing. Rather with levels that are found in our food supply.

The Harvard scientists found that eating even one meal containing a typical dose of this additive increased the levels of several hormones that control blood sugar levels in otherwise healthy people, causing blood sugars to spike and insulin levels to rise. We already know that repeated exposure to higher sugar and insulin levels leads to insulin resistance and diabetes — as well as easier weight gain.

Related: 7 food additives to always avoid

This study should give us all pause. Because it underscores how little we know about the effects of the various food preservatives and additives we are putting into our bodies. And even well-meaning government agencies, like the FDA, may not have every bit of information when they make their determination regarding the safety of these substances.

Which is why Step One Foods avoids using additives and preservatives in our foods. We understand that there is much we don’t know about these compounds and that the best way to avoid any negative health consequences is to simply avoid exposure.

By the way, most of the foods that contain propionate are foods we should be eating less of, regardless. Reducing your intake of processed foods will help you reduce your exposure to many of these types of substances.

Dr. Elizabeth Klodas MD, FACC

By Dr. Elizabeth Klodas MD, FACC

"Diet is a major driver of high cholesterol, but instead of changing the food, we prescribe medications. This never seemed logical to me.” Dr. Klodas has dedicated her career to preventive cardiology. Trained at Mayo Clinic and Johns Hopkins, she is the founder and Chief Medical Officer for Step One Foods. Dr. Klodas is a nationally sought out speaker and has an active role at the American College of Cardiology. Her clinical interests include prevention of heart disease and non-invasive cardiac imaging and she has published dozens of scientific articles throughout her career. Dr. Klodas has been featured on CNN Health for her mission to change how heart disease is treated. An independent study performed at leading medical institutions affirmed the ability of Step One Foods to deliver measurable and meaningful cholesterol-reduction benefits in the real world. The results of the trial were presented at the 2018 American Heart Association’s Scientific Sessions. Dr. Klodas has also authored a book for patients, "Slay the Giant: The Power of Prevention in Defeating Heart Disease," and served as founding Editor-in-Chief of the patient education effort of the American College of Cardiology. In addition to her practice and her duties at Step One Foods, she also serves as medical editor for webMD.

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