What Are Formaldehyde Releasers?

Why they’re still hiding in mainstream beauty products (and even some “clean” ones)

For 16 years, I worked behind the salon chair surrounded by hair color, shampoos, keratin treatments, styling products, and chemical services daily.

I had no idea one ingredient category would eventually force me to walk away from the career I loved.

That ingredient?

Formaldehyde releasers.

And the scary part is—they’re still incredibly common in personal care products today.

Not just in conventional beauty products.

Even some brands marketed as “natural,” “clean,” or “safe” still use them.

What are formaldehyde releasers?

Formaldehyde releasers are preservatives that slowly release small amounts of formaldehyde over time to prevent products from growing mold, bacteria, and yeast.

Why do companies use them?

Because they’re:

• Cheap
• Effective
• Easy to formulate with
• Extend shelf life
• Widely accepted in conventional manufacturing

To manufacturers, they help products last longer.

To sensitive individuals? They can become a major problem.

And here’s what many people don’t realize:

You may not react immediately.

Formaldehyde allergies and sensitivities are often considered delayed hypersensitivity reactions, meaning symptoms can show up hours—or even days—after exposure.

This makes it incredibly difficult to connect your symptoms back to your products.

My first symptoms

For years, I didn’t understand what was happening to me.

While working in the salon, I started noticing:

• Intense itching on my hands and arms
• Redness and irritation
• Sneezing fits
• Coughing
• Burning eyes
• Skin flare-ups
• Feeling worse when exposed to steam at the shampoo bowl
• Wanting to scratch my skin constantly

Eventually my reactions became impossible to ignore.

Repeated exposure made things worse.

And once your body becomes sensitized, even smaller exposures can begin triggering reactions.

That’s what happened to me.

It became severe enough that I had to step away from being a full-time stylist and completely rethink the products I was using.

That experience is what eventually led me to create Bella Hue.

Where formaldehyde releasers are commonly found

Many people assume this only applies to salon products or keratin treatments.

Not true.

They can show up in:

• Shampoo
• Conditioner
• Body wash
• Lotion
• Makeup
• Hair styling products
• Nail polish
• Liquid soaps
• Baby products
• Household cleaners
• Hair dye
• Lash glue
• Keratin smoothing treatments

Certain keratin treatments have received major scrutiny over the years because some can release formaldehyde when heated.

Occupational Safety and Health Administration and the Food and Drug Administration have both addressed concerns surrounding formaldehyde exposure in beauty environments.

Salon professionals can be especially vulnerable because exposure happens repeatedly throughout the day.

Signs it may be time to check your labels

If you regularly use beauty products and notice:

• Unexplained itching
• Red patches
• Burning skin
• Eczema flare-ups
• Sneezing after product use
• Watery eyes
• Scalp irritation
• Rashes on your neck or face
• Symptoms that seem random or delayed

…it may be worth looking at your ingredient labels.

Of course, these symptoms can have many causes, and this isn’t medical advice—but ingredient awareness matters.

Ingredient names to watch for

These are common formaldehyde-releasing preservatives that may appear on labels:

• DMDM Hydantoin
• Diazolidinyl Urea
• Imidazolidinyl Urea
• Quaternium-15
• Bronopol
• Sodium Hydroxymethylglycinate
• 5-Bromo-5-Nitro-1,3-Dioxane
• Methenamine
• Glyoxal

These names often sound harmless—or impossible to pronounce—which is why many consumers miss them.

Why this matters

I’m not here to fear-monger.

Preservation matters.

Products need protection against harmful microbial growth.

But there are alternative preservative systems available that don’t rely on formaldehyde releasers.

Consumers deserve transparency so they can make informed decisions.

And people dealing with mysterious skin reactions deserve to know what could be contributing.

What I do differently now

When I created Bella Hue, I made a commitment to avoid ingredients that contributed to my own health struggles.

That includes avoiding:

• Formaldehyde releasers
• Synthetic fragrance
• Parabens
• Phthalates
• Sulfates
• Artificial dyes

Because products should perform well without compromising your health.