Caramel Color (E150d): The Controversial Dye in Your Cola

TL;DR

Caramel Color (E150d, specifically "Sulfite Ammonia Caramel") is the most heavily processed type of caramel coloring. It is produced with ammonia and sulfites, creating a byproduct called 4-MEI, which is a possible human carcinogen. It's found in colas, root beers, and soy sauces. Kale rates it as Caution (Orange).

What is Caramel Color (E150d)?

Don't confuse this with the caramel you make at home by melting sugar in a pan (that's E150a).

E150d is made by heating carbohydrates with ammonia and sulfites under high pressure. This specific chemical process creates a rich dark brown color but also produces contaminants, most notably 4-Methylimidazole (4-MEI).

Where is it found?

It's the industry standard for anything brown.

• Dark Sodas: Coke, Pepsi, Dr. Pepper, Root Beer.
• Soy Sauce: Cheap brands use E150d instead of natural fermentation to get that dark color quickly.
• Balsamic Vinegar: Lower-quality vinegars add it to mimic the look of aged balsamic.
• Dark Bread: Some "wheat" breads are just white bread dyed brown with caramel color to look healthier.
• Gravy Granules: For that instant rich brown look.

Health Concerns

1. 4-MEI and Cancer Risk

The IARC (International Agency for Research on Cancer) classifies 4-MEI as "possibly carcinogenic to humans." In California, products with E150d exceeding a certain limit must carry a cancer warning label (Prop 65), which forced many soda companies to change their recipes only in California.

2. High Processing

It is far removed from natural sugar. The ammonia process makes it a heavily processed industrial chemical rather than a simple food ingredient.

3. Allergic Reactions

Because widely different base ingredients can be used (corn, wheat, or dairy), it can theoretically trigger reactions in people with severe sensitivities, though this is rare.

Kale's Verdict: Caution (Orange)

Kale rates E150d (Caramel Color) as Caution (Orange).

While regulatory bodies currently deem it safe in limits, the presence of a known carcinogen (4-MEI), however small, makes it an unnecessary risk for a purely cosmetic additive.

Note: E150a (Plain Caramel) is generally considered Safe (Green). It's specifically the ammonia-sulfite versions (E150c and E150d) that carry the risk.

How to Avoid It

1. Check the "E" Number: If it just says "Caramel Color," assume it's E150d unless stated otherwise, especially in sodas.
2. Buy Naturally Fermented Soy Sauce: Look for brands like Kikkoman that list "soybeans, wheat, salt" without added colors.
3. Avoid Dark Sodas: Clear sodas usually skip this specific additive.
4. Scan with Kale: We identify the specific type of caramel color whenever possible to keep you informed.

Final Thoughts

The rich brown color of your soda is a chemistry experiment, not burnt sugar. We think you can live without the side of ammonia.

Is your soy sauce fermented or fake? Download Kale to check.