Sulfates: The Good, The Bad, and The Ugly

In recent years, consumers have become more aware of the ingredients in their skincare and hair care products. This increased understanding has empowered them to take control of what goes into or on their bodies. Consequently, this awareness has shifted the market, with companies recognizing the demand for natural ingredients.

What are sulfates?

One of the most criticized ingredients in personal care products is sulfates. Sulfates are surfactants that create the foaming effect in soaps and shampoos. These detergents can attract both oil and water, allowing them to lift grease and grime off our skin and hair, dissolve it into a solution, and then rinse everything away. The most common sulfates are Sodium Lauryl Sulfate (SLS) and Sodium Laureth Sulfate (SLES).

The bad: sulfates can dry out your hair and scalp

While sulfates are effective at cleaning, they can also strip away healthy oils from the scalp and hair. This can leave the scalp and hair exposed to harmful microbes, allergens, environmental pollutants, and prone to damage, infection, and illness. Sulfates can stress the hair and scalp by removing the lipid cap, which protects the hair follicle's healthy biome. This removal can cause dryness, flakiness, and irritation to the scalp and damage to the hair cuticle, leading to frizz and further dryness.

The good: sulfate alternatives exist

SLES is a more refined version of SLS, making it gentler and less irritating. Despite the potential for sulfates to strip hair and scalp of healthy oils, it is important to note that there are gentler sulfate options available. Additionally, sulfates are not carcinogenic. No scientific evidence supports the claim that SLS is a carcinogen.

Natural hair care brands are moving towards different, gentler salts to cleanse hair. Some use natural sea salts, such as Rahua’s Color Full shampoo, which are gentler on the cuticle and scalp. Two sulfate alternatives are sodium lauroyl methyl isethionate, used in Innersenses’ Hydrating Cream Bath, which is a milder biodegradable surfactant, and tetrasodium glutamate diacetate, a biodegradable chelating agent.

The ugly: undiluted SLS can pollute waterways

In its raw form, SLS is considered moderately toxic to marine life. However, product formulations containing diluted SLS are generally not toxic to aquatic life. The manufacturing process is a critical factor, as runoff can enter waterways with undiluted SLS solutions. Therefore, it's essential to consider the environmental values of the product manufacturers.

Environmentally sustainable alternatives

Many environmentally conscious companies are turning to biobased solutions, which derive from renewable sources like coconut or palm kernel oil. This approach reduces the reliance on petroleum and the associated environmental and health impacts. Plant-derived SLS avoids the additional environmental damage caused by petrochemicals.

Both Rahua and Innersense use biobased cleansing agents and do not use undiluted SLS in their formulations. Understanding the effects of sulfates and exploring gentler, more sustainable alternatives can help protect your hair, scalp, and the environment. By choosing products with safe and environmentally friendly ingredients, consumers can enjoy the benefits of clean hair without the associated risks of harsh sulfates.

Works Cited