Sodium Lauroyl Methyl Isethionate

SO-dee-um lor-OY-ul METH-ul eye-SETH-ee-oh-nate

Surfactant 8/10 Safety CG ApprovedClean Semi-synthetic Vegan

What Is Sodium Lauroyl Methyl Isethionate?

A gentle anionic surfactant derived from coconut oil. It is a newer-generation cleanser that delivers rich lather without the harshness of traditional sulfates.

Source: Coconut oil (chemically processed)

Origin: Semi-synthetic

Also known as: SLMI, Iselux

What Does Sodium Lauroyl Methyl Isethionate Do to Your Hair?

Produces a rich, creamy lather while gently removing dirt, oil, and buildup. Maintains the hair's natural moisture balance and is much less stripping than SLS or SLES.

Best For

Curly hair, dry hair, color-treated hair, sensitive scalp, fine hair

Not Recommended For

Very oily hair, heavy buildup

Concentration Matters

5-15% in shampoos

Hair Type Compatibility

1A Straight Fine
1B Straight Medium
1C Straight Coarse
2A Wavy Fine
2B Wavy Medium
2C Wavy Coarse
3A Curly Loose
3B Curly Tight
3C Curly Corkscrew
4A Coily S-Shaped
4B Coily Z-Shaped
4C Coily Tight
Color-treated: Safe

Method Compatibility

Curly Girl (CG) Method: Approved
CG Approved

Safety & Regulation

8/10
AvoidCautionSafe

Considered very safe with low irritation potential. Does not strip hair proteins the way sulfates do. Well tolerated even by sensitive scalps.

FDA Status: Generally Recognized As Safe

FDA recognizes this as safe for cosmetic use at standard concentrations.

EWG Score: 1/10

HairAide Verdict

One of the best sulfate-free alternatives that still delivers satisfying lather. Highly recommended for curly and color-treated hair that wants a clean feel without the damage.

Products That Contain Sodium Lauroyl Methyl Isethionate

Sulfate-free shampoos, gentle cleansers, volumizing shampoos

Alternatives to Sodium Lauroyl Methyl Isethionate

If you want to avoid Sodium Lauroyl Methyl Isethionate, look for products with these ingredients instead:

Sodium Cocoyl Isethionate, Decyl Glucoside, Cocamidopropyl Betaine

Frequently Asked Questions

Is Sodium Lauroyl Methyl Isethionate safe for hair?

Yes, Sodium Lauroyl Methyl Isethionate has a safety rating of 8/10 and is generally considered safe for use in hair products. Considered very safe with low irritation potential. Does not strip hair proteins the way sulfates do. Well tolerated even by sensitive scalps.

Is Sodium Lauroyl Methyl Isethionate bad for curly hair?

Sodium Lauroyl Methyl Isethionate is CG-method approved and is generally considered safe for curly hair.

Is Sodium Lauroyl Methyl Isethionate CG-method approved?

Yes, Sodium Lauroyl Methyl Isethionate is approved for the Curly Girl method.

What can I use instead of Sodium Lauroyl Methyl Isethionate?

Some alternatives to Sodium Lauroyl Methyl Isethionate include: Sodium Cocoyl Isethionate, Decyl Glucoside, Cocamidopropyl Betaine

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