Sodium Lauroyl Lactylate
Explained
Sodium Lauroyl Lactylate (SLL) is a mild, plant-derived surfactant made by combining lauric acid with lactic acid.
It has two main jobs in a formula:
- It's a gentle cleanser that lifts dirt and oil without stripping your skin
- It's a co-emulsifier that keeps oil and water mixtures blended
A perk of this ingredient is that it leaves skin feeling soft and silky after rinsing. This is why you'll even see it in baby washes.
Another perk?
The lauric acid backbone gives it mild antimicrobial activity and lauric acid itself has been shown to suppress acne-causing bacteria in lab studies.
In 2023, scientists took a close look at how SLL behaves and found it can break apart the fatty outer layers of cells. This is basically why it cleans well and can fight off certain microbes.
The Cosmetic Ingredient Review (CIR) Expert Panel has reviewed it and concluded it's safe as used.
A 2017 survey showed concentrations up to 10% are used in rinse-off cleansers and roughly 0.5-5% being typical in skincare.
Animal and reconstructed-skin testing found it to be non-irritating at 10%, and it's well tolerated even on sensitive skin. The only caveat is to patch test if you have a lactic acid allergy.
As a lactylate salt used at low co-emulsifier concentrations, this ingredient is less likely to break down and release free lauric acid on skin. This ingredient is fungal acne safe.
See all 1,680 products with Sodium Lauroyl Lactylate
