Sodium lauryl sulfate (SLS) is a common ingredient in skincare and cleaning products, used for its thickening and foaming properties. While it has benefits, some consumers worry about its potential to irritate the skin.
This article examines SLS in skin care, highlighting its benefits and risks, and providing alternative options for those who would prefer to avoid it.
What Is Sodium Lauryl Sulfate (SLS)?
Sodium lauryl sulfate (SLS), a chemical surfactant derived from petroleum, palm oil, or coconut oil, is commonly used in beauty products, cosmetics, and cleaning agents. Its primary function is to create a foam and remove dirt. It is also used as a food additive, mainly as an emulsifier or thickener.
However, SLS may disrupt the skin barrier, leading to irritation and increased water loss. Dermatologists recommend avoiding SLS-based skincare products or choosing formulations with no more than 1% SLS.
How Is SLS Used in Skincare Products?
In cosmetics, sodium lauryl sulfate is used as a surfactant (creates foam to reduce the surface tension) and emulsifier (stabilizes and thickens solutions). It also helps blend ingredients that do not naturally mix, creating a smooth, uniform texture for easier application. SLS increases skin permeability, enhancing absorption.
It can be found in the following personal care products:
- Facial cleansers
- Hand creams
- Hand sanitizer
- Anti-itch creams
- Masks
- Lip balms
- Shower gels
- Shampoos
- Conditioners
- Hair-removal products
- Styling gel
- Hair dye
- Shaving foam
- Body washes
- Makeup removers
- Soaps
- Bubble bath
- Bath oils
- Detergents
- Toothpaste
- Mouthwash
- Sunscreen
How to Identify SLS in Skincare Products?
Sodium lauryl sulfate (SLS) may appear on product labels under different names, depending on the formulation and country of origin:
- Sodium lauryl sulfate (SLS)
- Lauryl sodium sulphate
- Lauryl sulfate sodium salt
- Sodium dodecyl sulfate (SDS)
- Sodium n-dodecyl sulfate
- Dodecyl sodium sulfate
- Sodium alkyl sulfate
Sodium Lauryl Sulfate (SLS) vs. Sodium Laureth Sulphate (SLES)
Sodium laureth sulfate (SLES) is a surfactant derived from SLS through a process called ethoxylation, which makes it milder, more water-soluble, and less irritating. While both SLS and SLES are considered safe for use, SLES is considered a gentler alternative, suitable for sensitive skin.
Benefits of Using SLS in Skin Care
When used appropriately, SLS can offer the following skin benefits:
- Effective cleanser – Removes dirt, oil, and other impurities by breaking down oils.
- Foaming agent – Creates a rich lather that creates a smooth texture and a pleasant experience.
- Easy-to-rinse - Reduces the surface tension, allowing water to rinse off dirt.
- Oil-trapping properties – Eliminates oil-based dirt and grime so it can be washed off easily.
- Increases water solubility – Helps the compound dissolve in water and disperse more evenly.
- Powerful surfactant – Lowers the surface tension between the ingredients, creating a texture that is easy to apply and spread.
Risks and Side Effects of SLS in Skincare Products
According to the Pesticide Properties DataBase, SLS is low to moderately toxic to humans but may trigger allergic reactions in the skin, eyes, or respiratory system. This ingredient is often misunderstood, mainly because it is found both in cosmetic and household cleaning products.
While there is no scientific evidence that SLS is unsafe for normal skin types, it can be harsh on sensitive skin and may aggravate the following conditions:
SLS may also irritate the eyes and skin, especially if you use higher concentrations or leave it on the skin for too long. Dermatologists recommend using eye cream for sensitive skin to prevent irritation or discomfort.
According to this study, there is no scientific evidence supporting the claim that SLS is a carcinogen.
Note: If your skin is prone to flare-ups, acne, or inflammation, read about our recommended skincare products for sensitive skin.
How to Safely Use SLS in Skin Care?
The FDA advises avoiding SLS in skincare when possible or choosing products with a concentration of 1% or less. The Cosmetic Ingredient Review (CIR) has evaluated current scientific data and confirmed that SLS is not harmful if applied briefly and then thoroughly rinsed off (e.g., soaps, shampoos).
Since sodium lauryl sulfate may cause skin discomfort, it is best used with ceramides, which help maintain the skin barrier and moisture balance. Combining protective lipids with SLS can minimize dryness and support overall skin health.
SLS-Free Skincare
Natural skincare products offer a healthier alternative to SLS-based cosmetics. They feature microbiome-friendly ingredients that nourish the skin while minimizing irritation and allergic reactions.
SLS-free skincare products are typically free from other synthetic, harsh chemicals like parabens, phthalates, alcohol, and silicone, which make them ideal for sensitive skin.
SLS-Free Skincare Products
Our skin experts recommend the following SLS-free cosmetic products.
Vibrant 6-Step Blemish System
The 6-step blemish system contains products specifically formulated to target acne breakouts, clogged pores, and blemishes. The microbiome-friendly ingredients in these six products work together to maintain healthy skin flora, regulate oil production, and help prevent future breakouts.
The products are numbered for your convenience, allowing you to use them in the order specified in the packaging. Apply the first four products daily, starting with CLEANSE and ending with RESTORE. Use the MUD mask and SPOT ON treatment as needed for extra blemish control.
Desert Vibe Serum – Moisture Boosting Serum
Desert Vibe is a lightweight serum with science-backed ingredients that deeply hydrate, strengthen the skin barrier, and support skin immunity. Beta-glucan, centella, neurophroline, and prickly pear work together to boost collagen, support healing, refine scars, and brighten the complexion.
Vibrant C Serum – Bioavailable Vitamin C and Glutathione Serum
This skin-brightening serum pairs collagen-boosting amino acids with potent antioxidant ingredients like vitamin C, glutathione, ferulic acid, alpha lipoic acid, and NAC. It supports wound healing, enhances antioxidant protection, brightens the complexion, and neutralizes free radicals to maintain a healthy skin microbiome.
Conclusion
If you have sensitive skin or prefer natural skincare, you may choose to avoid products containing SLS. Fortunately, it is becoming easier to find medical-grade skincare options that do not contain artificial ingredients, preservatives, or skin-disrupting components.
Our skin experts will help you choose the most suitable SLS-free skincare products with clean, natural ingredients for healthy skin.
