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Is Corn Syrup Vegetarian?

Jennifer Hanes MS, RDN, LD

Navigating dietary preferences can be challenging, especially in multivore families where vegetarians coexist with omnivores.

In such households, understanding ingredient labels becomes crucial for maintaining a vegetarian lifestyle while accommodating diverse dietary needs.

One common ingredient that often raises questions among vegetarians is corn syrup. Derived from cornstarch, corn syrup serves various purposes in processed foods, from sweetening to texture enhancement.

However, its vegetarian status and potential concerns surrounding its production process remain topics of debate.

In this brief guide, we address common queries and provide practical insights for multivore families striving to make informed dietary choices. 

Understanding Corn Syrup

Corn syrup was first produced by treating cornstarch with hydrochloric acid, heat, and pressure to produce a syrup that can be used in multiple ways.  Now, an enzymatic process makes the process easier and cheaper.

This versatile sweetener serves various functions in food production. Firstly, it acts as a mild sweetener, imparting a subtle sweetness to a wide range of products.

Secondly, corn syrup serves as a humectant, preventing other sugar sources from crystallizing and thereby enhancing the texture and shelf life of foods.

Additionally, its unique properties make it invaluable in baking, where it helps soften the texture of baked goods and enhances their flavor.

High Fructose Corn Syrup

Corn syrup can also be further processed to create high-fructose corn syrup (HFCS). This is also done through enzymes.

This is the corn syrup most people are familiar with. HFCS is commonly used as a cheaper and easier-to-use alternative to table sugar in products such as sodas and imitation maple syrup. 

Despite common complaints about the prevalence of HFCS in our foods, regular table sugar remains the predominant sugar in our global food supply, and consumption is decreasing in the United States. 

Label Reading Tips

In the United States, corn syrup and high fructose corn syrup must be included in the ingredient list.  Other names that may indicate corn syrup are:

  • glucose syrup
  • corn sweetener
  • fructose
  • glucose-fructose syrup

You should also be aware of food items that contain corn syrup (or other sources of sugar) that you wouldn’t expect.  Check the labels of products such as:

  • Condiments – ketchup, mayonnaise, steak sauce, etc
  • Salad dressings
  • Canned fruit
  • Processed meat or faux meat
  • Peanut Butter

Vegetarian Status of Corn Syrup

Concerns regarding the vegetarian status of corn syrup often stem from uncertainty surrounding the production process. However, upon closer examination, it becomes evident that these concerns may be unfounded.

Potential Concerns for Vegetarians

The enzyme used in the production of corn syrup is alpha-amylase.  This enzyme is commonly found in mammals to help them break down carbohydrates in their diet.

In corn syrup manufacturing, bacteria produce the alpha-amylase enzyme, making it completely suitable for the vegetarian and vegan lifestyle.

This concern appears to arise from the use of rennet to make some cheeses. In the past, manufacturers traditionally derived the enzyme rennet from the stomach lining of cows, goats, and sheep, posing a challenge for some vegetarians.

However, today, they increasingly source this enzyme from bacteria.

Another concern arises from the possibility of cross-contamination with animal-based ingredients during the manufacturing process. However, stringent regulatory measures and industry standards minimize the risk of such contamination.

Food production facilities adhere to strict guidelines set forth by regulatory bodies, undergo regular inspections, and face severe penalties for violations.

Therefore, while there is a theoretical possibility of cross-contamination, the likelihood is exceedingly low in practice.

Environmental Impact of Corn Syrup

When it comes to corn syrup, it’s important to consider its environmental impact.

Growing loads of corn for syrup means lots of monoculture farming, which isn’t great for soil health and biodiversity.

Plus, all that corn needs tons of water, which can be a problem in areas already short on H2O. Using alternatives like maple syrup or agave nectar can be a more eco-friendly choice.

By being mindful of what we consume, we can lessen our environmental footprint without sacrificing sweetness.

Compared to cane sugar, the production of HFCS needs more water and produces more greenhouse gasses.  There also seems to be a lower potential for green production in the future.

I wasn’t able to find any definitive research on the environmental impact of regular corn syrup vs high-fructose corn syrup or other sweeteners.

While this doesn’t technically make corn syrup not vegan, environmental concerns are often a reason for reducing animal-based foods, so it is something to consider.

Culinary Inspiration

If you want to experiment with corn syrup in your own kitchen, try incorporating it into your baking recipes to add moisture and enhance flavor.

From gooey pecan pies to chewy chocolate chip cookies, corn syrup can work wonders in achieving that perfect texture and sweetness. 

Note that when baking, try to find recipes specifically written with corn syrup. Baking recipes tend to be super specific in order to get the structure you need.

You can also use it to make homemade candies, caramel sauces, and glazes for roasted veggies or tofu. Growing up, we sometimes used it in place of pancake syrup. 

Practical Application

Consider both corn syrup and high-fructose corn syrup as vegan-friendly ingredients.

However, it’s essential to recognize that the terms “vegan” or “vegetarian” do not inherently equate to healthfulness. When incorporating sweeteners into your diet, it’s crucial to consider overall sugar intake and prioritize a balanced diet rich in fruits, vegetables, protein, and healthy fats.

Enjoy sweets in moderation, focusing on mindful consumption and savoring the experience without compromising on overall nutrition integrity.

Questions about the vegetarian suitability of other foods? Learn more:

Is lard vegetarian?

Are truffles vegetarian?

Is corn syrup vegan?

Corn syrup is completely vegan, though some vegans or vegetarians may object to the environmental impact of excess corn farming.

Is Karo syrup vegan?

Yes, the manufacturer claims that their products are vegan.

Is corn starch vegan?

Yes, corn starch, the precursor to corn syrup, is completely vegetarian and vegan-friendly.

Is high fructose corn syrup vegan?

Yes, HFCS is a vegan-friendly product.

Is maize starch vegetarian?

Yes, maize starch is an alternative name for corn starch.

Jenn in a grey and white half sleeved shirt in front of a beige wall and a abstract city painting

Jennifer Hanes MS, RDN, LD is a registered dietitian, mom, wife, and vegetarian in North Texas. She has dedicated Dietitian Jenn to be a source of information, ideas, and inspiration for people like her, vegetarians that live with people with different dietary beliefs and/or needs in a multivore household.

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