What Are Gums, and Why Are They in Your Dairy Products?

If you’ve ever read the ingredient list on a container of yogurt, a tub of cream cheese, or a bottle of chocolate milk, you have likely seen the word “gum.” For example, guar gum, xanthan gum, and locust bean gum. Many readers pass over these names while others may assume they are artificial. Most gums are naturally derived and are among the most thoroughly studied ingredients.

What is a gum?

Gums belong to a category of ingredients called hydrocolloids: long chains of sugar molecules that thicken or gel when mixed with water.

These long chains dissolve or disperse in water, tangle together, and hold water molecules within that network, which gives the solution its body. Because these chains are long, only a tiny quantity is needed to achieve the desired thickening effect (BeMiller & Huber, 2008), which is why gums are listed near the end of most ingredient panels.

Many of the most common gums come from natural sources. Guar gum and locust bean gum, for instance, come from legume seeds, and guar in particular produces some of the highest viscosity of any natural gum available (BeMiller & Huber, 2008). Xanthan gum is made via fermentation. Carrageenan is extracted from red seaweed. Gum arabic, used less often in dairy but common in beverages, comes from the hardened sap of acacia trees. Whatever their source, plant, seaweed, or microbial, these gums have been studied and used in food for decades.

What gums do in dairy products

Gums are added to solve unique problems in how a product looks, feels, and holds together. As one dairy industry publication put it, gums “help build viscosity and improve texture” (Dairy Foods, n.d.).

The interaction between carrageenan and milk proteins provides a clear example. Kappa-type carrageenan binds with kappa-casein in milk and forms a soft, pourable gel; this thickening effect is five to ten times stronger in milk than in water (BeMiller & Huber, 2008; Cyber Colloids, n.d.). Because of this, roughly 150 to 250 parts per million, or about two hundredths of one percent, is enough to keep cocoa particles suspended in chocolate milk (Cyber Colloids, n.d.). Carrageenan matters most in chocolate milk sold in clear bottles, where any cocoa settling to the bottom would be visible on the shelf (Berry, 2017). In cream cheese, gums serve a similar role: keeping moisture from separating out and giving the product a smooth, spreadable mouthfeel.

Gums are added to solve unique problems in how a product looks, feels, and holds together. As one dairy industry publication put it, gums “help build viscosity and improve texture” (Dairy Foods, n.d.). The interaction between carrageenan and milk proteins provides a clear example. Kappa-type carrageenan binds with kappa-casein in milk and forms a soft, pourable gel; this thickening effect is five to ten times stronger in milk than in water (BeMiller & Huber, 2008; Cyber Colloids, n.d.). Because of this, roughly 150 to 250 parts per million, or about two hundredths of one percent, is enough to keep cocoa particles suspended in chocolate milk (Cyber Colloids, n.d.). Carrageenan matters most in chocolate milk sold in clear bottles, where any cocoa settling to the bottom would be visible on the shelf (Berry, 2017). In cream cheese, gums serve a similar role: keeping moisture from separating out and giving the product a smooth, spreadable mouthfeel.

Are gums safe?

Every gum used in food sold in the United States must meet the FDA’s standard for being Generally Recognized as Safe (GRAS). The FDA defines a food additive as anything intentionally added to food that requires approval, “unless the substance is generally recognized, among qualified experts, as having been adequately shown to be safe under the conditions of its intended use” (U.S. Food and Drug Administration, n.d.). A gum earns that recognition either through direct scientific study or, for ingredients used in food before 1958, through a long history of common use (U.S. Food and Drug Administration, n.d.).

Carrageenan draws the most questions, and much of that concern traces back to a different substance. Food-grade carrageenan is processed with alkaline substances; a degraded form, sometimes called poligeenan, is made with acid and is not approved as a food additive. Concerns about carrageenan are largely based on that degraded form, and research has not supported the idea that food-grade carrageenan converts into it in the human gut (Oliveira, 2025).

Some gums may even offer modest benefits. Guar gum acts as a soluble fiber that slows digestion, which may help moderate blood sugar spikes (Oliveira, 2025).

Why gums sound worse than they are

Some of the hesitation around gums has more to do with their names than their chemistry. Aaron Venables of DuPont Nutrition & Biosciences noted, “People don’t consider xanthan gum clean only because it has an X in front of it” (as cited in Food Processing, n.d.). He made a similar point about carrageenan, which “has taken a hit in the last six or seven years as an ‘unclean’ ingredient, but it’s 100 percent natural” (as cited in Food Processing, n.d.). Pectin, by contrast, rarely draws the same criticism, in part because people recognize it from home canning (Food Processing, n.d.).

In Conclusion

Gums are added in small, measured amounts to solve specific problems: keeping texture even, preventing separation, and maintaining consistency over a product’s shelf life. At High Desert Milk, understanding how these ingredients behave in dairy systems is part of how we produce high-quality and reliable products

References

• BeMiller, J. N., & Huber, K. C. (2008). Carbohydrates. In S. Damodaran, K. L. Parkin, & O. R. Fennema (Eds.), Fennema’s food chemistry (4th ed., pp. 83–154). CRC Press.
• Berry, D. (2017, September 26). Stabilizer options for dairy formulations. Food Business News. https://www.foodbusinessnews.net/articles/10654-stabilizer-options-for-dairy-formulations
• Cyber Colloids. (n.d.). Introduction to carrageenan: Milk. Retrieved September 23, 2026, from https://cybercolloids.net/information/technical-articles/introduction-to-carrageenan-milk/
• Dairy Foods. (n.d.). Gums, stabilizers and emulsifiers are dairy’s supporting actors. Retrieved September 22, 2026, from https://www.dairyfoods.com/articles/95384-gums-stabilizers-and-emulsifiers-are-dairyssupporting-actors
• Food Processing. (n.d.). When are gums and hydrocolloids clean-label? Retrieved September 22, 2026, from https://www.foodprocessing.com/ingredients/gums-and-hydrocolloids/article/11302204/whenare-gums-and-hydrocolloids-clean-label
• Malcom, K. (2022, April 13). Study helps explain how xanthan gum, a common food additive, is processed in the gut. Michigan Medicine Health Lab. https://www.michiganmedicine.org/health-lab/study-helpsexplain-how-xanthan-gum-common-food-additive-processed-gut
• Oliveira, N. (2025, July 25). Food additives. The Nutrition Source, Harvard T.H. Chan School of Public Health. https://nutritionsource.hsph.harvard.edu/food-additives/
• U.S. Food and Drug Administration. (n.d.). Generally Recognized as Safe (GRAS). Retrieved September 22, 2026, from https://www.fda.gov/food/food-ingredients-packaging/generally-recognized-safe-gra