5 Toxic Soap Ingredients to Avoid for Eczema & Sensitive Skin

Like brushing your teeth or washing your hair, bathing is such a daily habit that most of us don’t stop to question what’s actually in our soap. But if you or someone in your family deals with eczema, sensitive skin, or unexplained irritation, those ingredients matter more than you might think.

Many conventional soaps are made with harsh chemicals that can strip the skin’s natural barrier, trigger flare-ups, and quietly make eczema symptoms worse over time. The tricky part? These ingredients often hide behind labels that sound harmless or familiar.

That’s why learning which soap ingredients to avoid for eczema is such an important first step toward healthier skin. Below, we’re breaking down the five most toxic ingredients commonly found in soap—plus what to look for instead if you’re searching for a gentle, non-toxic soap your skin can trust.

Why Soap Ingredients Matter for Eczema-Prone Skin

When you’re dealing with eczema, your soap can either support your skin or make symptoms worse. Many conventional soaps are formulated to strip oil and create heavy lather, not protect the skin barrier. They often contain harsh ingredients and additives that disrupt moisture balance, trigger irritation, and lead to more frequent flare-ups.

Eczema-prone skin already struggles to stay hydrated and resilient, which is why ingredient choice matters so much. A good eczema soap focuses on simplicity: fewer ingredients, no hidden fragrance, and no harsh detergents. Choosing a gentle, non-toxic soap helps reduce irritation and gives your skin the chance to stay calm and supported.

5 Toxic Soap Ingredients to Avoid

Have you ever switched soaps hoping for relief, only to end up with even drier skin? We have, too. We’ve learned the hard way that not all soaps are created equal, especially when your skin is sensitive or prone to flare-ups.

Here are five common soap ingredients to avoid for eczema or sensitive skin support. 

1. Parabens

Parabens are chemicals that are used to preserve cosmetics and personal care products, the same way chemical preservatives are used to keep foods from spoiling while they sit on store shelves. Because widespread paraben use is still a relatively modern occurrence, we don’t have definitive scientific research on how it impacts the body.

There is, however, a 2004 study that found traces of intact parabens in the breast tissue of women. While the study didn’t link the existence of the parabens to an increased incidence of breast cancer, it does reveal the chemicals’ ability to penetrate the skin and remain in the body unaltered by metabolism.

Additionally, according to the Environmental Working Group, parabens can “act like the hormone estrogen in the body and disrupt the normal function of hormone systems.” If you have eczema or highly sensitive skin, parabens can further disrupt hormone balance and aggravate an already compromised skin barrier.

2. Fragrance

One of the best ways to avoid products with unsafe ingredients is to check ingredient labels for known toxins. Sometimes, however, that approach doesn’t work. Because the FDA doesn’t require cosmetic manufacturers to list the specific ingredients that are used to create their product’s scent, the word “fragrance” is often a convenient hiding place for some pretty toxic chemicals. 

Researchers found that the fragrances of up to 100% of cosmetic products contained known allergens. Phthalates are a group of chemicals that are used as a solvent and fixative in fragrances. They have been shown to cause damage to the liver, kidneys, lungs, and reproductive system, including the still-developing testes of male babies in utero.

Fragrance is one of the most common triggers for eczema flare-ups, which is why it’s often the first ingredient dermatologists recommend avoiding in an eczema soap.

3. 1, 4-Dioxane

Like the compounds that make up your favorite soap’s scent, you probably also won’t find 1, 4-Dioxane on any ingredient labels. 1, 4-Dioxane is found in soaps and other sudsy products, and it is created when common ingredients are mixed together. 1, 4-Dioxane is a byproduct of this process — not a standalone ingredient — which explains why the FDA doesn’t require that it be listed on labels.

The Environmental Working Group (EWG) notes that while 1, 4-Dioxane can easily be removed from products prior to packaging, it remains in up to 46% of personal care products on the market. This is a critical issue, as the EWG considers 1, 4-Dioxane highly hazardous. Even short term exposure to the chemical can cause irritation of the eyes, nose, and throat, as well as kidney and liver disease. Long term exposure can cause cancer, and 1, 4-Dioxane is also known to pass through a mother’s breast milk.

4. Sodium Lauryl Sulfate (SLS)

Whether they’re washing their hands or their body, many people equate the efficacy of soap to the amount of lather it generates. Unfortunately, all of those suds come at a cost. Sodium Lauryl Sulfate, also known as SLS, is the ingredient added to soap to make it lather, and according to the EWG’s Cosmetics Database, it’s highly toxic.

SLS carries a high concern for irritation of the skin, eyes, and lungs, as well as moderate concern for organ system toxicity. For eczema-prone skin, SLS can strip away protective oils and worsen dryness, itching, and inflammation.

5. Triclosan

In September 2016, the FDA banned triclosan, an antibacterial and antifungal ingredient used as a preservative in personal care products. The chemical has been found to negatively impact the immune system and cardiovascular function, while also potentially triggering an increase in allergy and asthma symptoms, antibiotic and antimicrobial resistance, and lower testosterone levels (to only name a few side effects).

Unfortunately, the FDA ban didn’t eliminate these risks. The ingredients found in antibacterial soaps place the products in the same category as over-the-counter drugs, so antibacterial soaps are regulated by the FDA. Traditional soaps, however, are not.

Even after the antibacterial soap ban on triclosan, it is still found in 2,000 or more products. Because of its frequent use in personal care products, research estimates that up to 75% of Americans are currently exposed to this dangerous chemical. Antibacterial ingredients like triclosan can interfere with the skin’s natural microbiome, which eczema-prone skin relies on to stay balanced.

Choosing a Non-Toxic Eczema Soap You Can Trust

Choosing a non-toxic soap is especially important for families dealing with eczema or sensitive skin. At Bend Soap Company, we craft gentle, hypoallergenic eczema soap options that cleanse without stripping the skin or triggering irritation.

Our original Unscented Goat Milk Soap is made with just four ingredients: fresh goat milk, coconut oil, olive oil, and sustainably sourced red palm oil. These ingredients nourish the skin with vitamins and minerals leaving it soft and supple with no danger of irritation or worse. It’s even safe for newborns!

We also have more than a dozen scented varieties that are free of dangerous, mysterious “fragrances.” Instead, they’re made with high-quality essential oils like geranium rose, tea tree, and lavender.

Protect Your Skin by Choosing a Cleaner, Safer Soap

Lathering up in the bath or shower shouldn’t put you at risk for harmful health conditions like skin rashes or eye irritation. When it comes to caring for sensitive or eczema-prone skin, what you leave out of your soap matters just as much as what you put in. 

Choosing a non-toxic soap made with simple ingredients is one of the easiest ways to support healthier skin every day. By skipping common soap ingredients to avoid for eczema and opting for a gentle eczema soap instead, you give your skin the chance to stay calm, hydrated, and resilient. 

Our all-natural goat milk soap was created for families navigating sensitive skin and eczema, using only clean, non-toxic ingredients you can feel good about using every day.

More on Non-Toxic Living & Skincare Support:

• How to Live a Healthy, Toxin-Free Life
• The Hidden Dangers of Bath Bombs You Need to Know 
• Using Goat Milk Soap as Face Wash
• Your Exfoliating Face Wash is Doing More Harm Than Good
• Must-Have Skincare Products for Newborns