The chemicals to avoid — and a cleaner choice

Why the Ingredient Label Matters More Than You Think

The skin is not a barrier in the way we sometimes imagine. It absorbs. The products we apply — especially during and after bathing when the skin is warm and hydrated — can penetrate beyond the surface. For most healthy adults, the body can process small exposures to many ingredients. But daily, cumulative exposure to certain chemicals is a different conversation.

Research has consistently linked several common soap ingredients to skin irritation, allergic reactions, and in some cases, hormonal disruption (Medical News Today, n.d.; CHEM Trust, n.d.). People with sensitive skin, eczema, or hormonal concerns have the most to gain from reading labels carefully — but the information matters for everyone.

The good news: identifying what to avoid is straightforward once you know what to look for.

The Chemicals Most Commonly Found in Commercial Soap

These are the ingredients with the most documented evidence of concern. Note that not every commercial soap contains all of these — but they appear frequently enough to warrant knowing their names.

• Synthetic Fragrances

  The word "fragrance" or "parfum" on a label can represent a blend of dozens of undisclosed chemicals, including linalool, limonene, and oakmoss absolute. These are among the most common triggers of allergic contact dermatitis, hives, and photosensitivity reactions in cosmetic products (Medical News Today, n.d.). There is no requirement for manufacturers to disclose the specific compounds within a "fragrance" blend.

• Sodium Lauryl Sulfate (SLS)

  SLS is a surfactant — it creates lather and removes oils. It is also a known skin irritant, particularly for people with sensitive skin or compromised skin barriers. Current evidence does not support claims that SLS causes cancer or hair loss, but it can disrupt the skin's natural moisture barrier with repeated use (Medical News Today, n.d.).

• Parabens

  Methylparaben, propylparaben, and butylparaben are used as preservatives in many personal care products. Research has shown they can weakly mimic estrogen and interact with the endocrine system. While the FDA has not banned parabens in the U.S., they have been restricted or prohibited in several countries, and ongoing research continues to examine their cumulative effects (Tree to Tub, n.d.).

• Triclosan

  Triclosan was once a standard ingredient in antibacterial consumer soaps. In September 2016, the U.S. Food and Drug Administration issued a final rule prohibiting triclosan — along with 18 other active ingredients — from consumer antiseptic wash products, citing insufficient evidence that they were safe for long-term daily use and concerns about antibiotic resistance and potential hormonal effects (U.S. Food and Drug Administration, 2016). Despite the ban on hand soaps, triclosan may still appear in other products.

• Formaldehyde-Releasing Preservatives

  Ingredients such as quaternium-15 and methylene glycol are used as preservatives and can slowly release formaldehyde — a known human carcinogen — over time. These ingredients are more common in liquid soaps and cleansers than in bar soaps, but they appear across the category (Medical News Today, n.d.).

• Endocrine-Disrupting Chemicals (EDCs)

  Beyond parabens, certain UV filters and synthetic fragrance compounds found in soaps have been identified as potential endocrine disruptors. Chronic low-level exposure to EDCs has been linked in research to reproductive issues, developmental concerns, and hormone-related health outcomes (CHEM Trust, n.d.).

• Volatile Organic Compounds (VOCs)

  Some scented soaps release volatile organic compounds during use, particularly in enclosed spaces like bathrooms. The American Lung Association identifies VOCs from cleaning and personal care products as a potential source of indoor air pollution that can irritate the respiratory system with repeated exposure (American Lung Association, n.d.).

What to Look for in a Cleaner Soap

Switching to a cleaner soap doesn't require a chemistry degree. A few straightforward criteria cover most of the risk:

• 01
  Short, recognizable ingredient list

  The fewer the ingredients, the less exposure risk. Look for bars where you can identify and understand every item on the label.

• 02
  Fragrance-free or essential oil-scented

  Avoid products that list "fragrance" or "parfum" without disclosing what's inside. If scent is important to you, look for soaps that disclose specific essential oils — though note that some essential oils can also cause sensitivity in certain individuals, so patch testing is always wise.

• 03
  No parabens, SLS, or triclosan

  These three appear frequently and are the simplest to screen for. Many clean beauty brands explicitly label products as free of these ingredients.

• 04
  Plant-based oils as the primary base

  Soaps built on coconut oil, olive oil, or shea butter have a long history of use and are generally well-tolerated. Castile soap — made from plant oils — is one of the most widely studied natural soap options (Medical News Today, n.d.).

• 05
  Check EWG Skin Deep ratings

  The Environmental Working Group's Skin Deep database rates cosmetic ingredients by hazard level. Products rated "A" or "1–2" on their scale are lowest-risk. It's a useful, free tool for evaluating unfamiliar ingredients (Medical News Today, n.d.).

The Ensō Apothecary Approach to Clean Soap

At Ensō Apothecary, our soap is created with organic virgin coconut oil — a plant-based ingredient with a well-established profile and natural cleansing and moisturizing properties. It is handmade, vegan, and formulated without synthetic fragrances, parabens, SLS, or triclosan.

The intention behind the formula goes beyond ingredient avoidance. We believe a soap you use every day should do more than clean — it should be a product you feel good about putting on your body, one that contributes to your overall wellness practice rather than working against it.

A short ingredient list isn't a marketing claim. It's the result of a deliberate choice to leave out what doesn't belong.

Practical Tips for Reading a Soap Label

Ingredient lists on personal care products follow INCI (International Nomenclature of Cosmetic Ingredients) naming conventions, which means common ingredients appear under their scientific names. A few things to keep in mind:

For children and sensitive skin: Choose fragrance-free, dermatologist-tested soaps with minimal ingredients. Children's skin is thinner and more permeable, making ingredient quality especially important.

On "natural" claims: The word "natural" is not regulated on personal care product labels in the U.S. It does not guarantee the absence of the chemicals listed above. Always read past the marketing language to the actual ingredient list.

On lye: All true soap — including handmade, natural soap — is made using lye (sodium or potassium hydroxide) as part of the saponification process. When soap is properly made, no lye remains in the finished bar. Its presence in the manufacturing process does not make a soap harmful (Tree to Tub, n.d.).

The simplest rule: if you can't identify most of the ingredients on a label, look for a product with fewer of them.