Caramel Color E150d: Is It Safe?

January 19, 2026

If you check a food label, you might find the term “Caramel Color E150d.” This could prompt you to ask: is it a safe option? Very briefly put, it is. Regarding scientific evidence, several giants, for example, the U.S. Food Drug Administration (FDA), and the European Food Safety Authority (EFSA), have declared it safe. They are talking about the amounts that we regulary consume. The question of safety is about a substance called 4-methylimidazole (4-MEI) and not the color. This substance may occur during the production of the dye.

What is Caramel Color E150d

E150d or Caramel color E150d is one of the widely used food colorings. Its systematic name is Sulfite Ammonia Caramel. It is produced via a carefully controlled heating of sugars primarily obtained from corn syrup. At the same time, sulfite and ammonia compounds are introduced into the mixture.

A resultant is a very robust, brown liquid (which can also be encountered in powdered form). It has the solubility in water. Many companies use it as a coloring agent for different products. It is used in colas and other soft drinks but also in soy, brown bread, and vinegars.

It has special color intensity, stability in a wide pH range. This allows it to be used successfully in acidic drinks like sodas. It takes care that the drink you like to have looks the same every time you buy it.

Caramel Colors Are Not All the Same

The use of terms “caramel color” makes everything mystifying. Safety researchers differentiate caramel colors into four different classes. Each is produced using different methods. Each has a different E-number.

Relevant classes also help comprehend caramel color safety issues. The discussion of safety revolves around caramel color E150d. The four types are listed in the table below.

Class	E Number	Name	Reactants Used	Contains 4-MEI?	Common Foods
Class I	E150a	Plain Caramel	None (or acids/alkalis)	No	Breads, spirits, dairy
Class II	E150b	Caustic Sulfite Caramel	Sulfite compounds	No	Tea, some whiskeys
Class III	E150c	Ammonia Caramel	Ammonia compounds	Yes	Beer, soy sauce, gravy
Class IV	E150d	Sulfite Ammonia Caramel	Sulfite & Ammonia	Yes	Colas, soft drinks, baked goods

As demonstrated, the contention concerning health and safety is around Class III (E150c) and Class IV (E150d). This is due to the fact that the making process of these two involves ammonia, which can produce the byproduct 4-MEI.

Main Concern: What is 4-MEI?

But what exactly is 4-MEI, and why does it pose a risk? 4-methylimidazole (4-MEI) is a compound of chemistry. It can be formed as a byproduct from the production of Class III and Class IV caramel colors.

It is not something that is added as an ingredient. Instead, it is a product that is generated during the heating process. Besides, 4-MEI does occur in nature. For example, it is generated during the roasting of coffee beans and the grilling of meat. The formation of this brown color is known as the Maillard reaction.

Disputes emerged in the year 2007. The National Toxicology Program (NTP) released a research paper about 4-MEI. This research brought to light one interesting finding. Mice in the study who were fed very high doses of 4-MEI showed increased lung tumors.

Because of the findings from this animal study, the International Agency for Research on Cancer (IARC) classified 4-MEI. It is found in “Group 2B: Possibly carcinogenic to humans.” This is a group for the limited evidence ones in humans but quite a lot in animals. Other members in the same group include aloe vera extract and pickles.

This made California add 4-MEI to the Prop 65 list. This law mandates products to label a warning. A warning is needed if the products involve consumers in excess of 29 micrograms of 4-MEI per day.

Informed Consumer's Guide to Healthy Eating

As a consumer, it is important to be aware of what you eat. By understanding the way labels work, you can make better choices.
As you go shopping, it is wise to check the ingredient list. In the United States, it could be stated as “Caramel Color” or “Artificial Color.” In Europe and many countries, you will find a more detailed E-number, which is “E150d.”

When the product is dark brown like a cola, and “Caramel Color” is shown on the label, it is almost certainly Class IV (E150d). This is because this is the most commonly used and adaptable of the caramel colors. It is chosen for its superiority in acidic drinks.

Some of the common foods that usually have Caramel Color E150d are cola and other dark soft drinks, vinegar and some soy sauces, brown bread, and baked goods. *Gravies, marinades, and soup bases, some beers and spirits

It is you who decides whether to use or not to use E150d, it is a personal decision. If you have any concerns, labels are the best way to go. Read the labels and choose products that do not contain the ingredient. But it is also good to note that major health organizations have said that sporadic consumption of this food is not dangerous.

Conclusion

So, coming back to our main question. Is eating caramel color E150d safe for you? From what we know based on the current science, the answer is yes. It is a popular food dye that has been approved by regulators worldwide.

The argument talks about the by-product 4-MEI. However, the levels that we get in our diet are quite, quite minimal. They aren’t even close to the huge doses that caused problems in lab animals.

Ultimately, you are the one who sets the guidelines when it comes to your food. Now you are equipped and can confidently tell the difference between what is right and wrong. There is no scientific evidence to friction. This applies to an average person’s diet of foods containing caramel color E150d.

Frequently Asked Questions (FAQ)

Q1:Is caramel color E150d vegan and gluten-free?

Definitely. Caramel color is of carbohydrate root like corn. The processing removes gluten proteins, thereby, making it suitable for gluten-free diets. It is manufactured without using any animal products; so, it is also vegan.

Q2:What is the difference between caramel color and caramel candy?

They are completely different types of food. Caramel candy is prepared by slowly adding milk and butter to hot sugar which makes a sweet treat. Caramel color E150d is produced by heating sugar with the use of chemicals creating a dark-colored and bitter agent. You would never wish to taste caramel color on its own.

Q3: Why don't companies just stop using caramel color E150d?

Caramel color E150d can already serve its purpose effectively, cheaply, stably, and especially is so in the case of acidic drinks like soda. As a result, the products are going to have a stable color that consumers expect. While maintaining the same performance and price, some other natural colors do not exist.

Q4:Does 4-MEI cause cancer in humans?

The reason is that there is no direct evidence pointing to the fact that the low levels of 4-MEI in food cause cancer in humans. The speculation comes from studies where animals were fed very high doses. The IARC termed it “possibly carcinogenic,” a very cautious judgment. It is a term which is used when data is lacking on humans.

Q5: Are there natural alternatives to caramel color?

Yes, many companies, in fact, are using natural colors that are sourced from vegetable dyes such as beet juice, annatto, and turmeric. However, they may not always be effective in all products. They may not be able to achieve the same dark brown color, stability, or low cost as caramel color E150d.