Glyceryl Oleate
Explained
Glyceryl Oleate is the monoester of glycerin and oleic acid. It is a skin-conditioning emollient that also helps form emulsions.
What makes glyceryl oleate special is its "re-fatting" effect.
When you wash your hair and skin with a surfactant-based cleanser, the surfactants grab onto everything. This includes your skin's natural lipids, or the fats that live in your skin barrier and sebum. Once you rinse these surfactants away, it leaves your skin feeling tight, dry, and clean (in a not-good way).
Re-fatting is essentially putting some of these lipids back. Glyceryl oleate deposits a thin layer of emollient lipids back on the skin or hair surface reduce some of the barrier damage.
Also, glyceryl oleate isn't a foreign molecule to your skin. It's chemically identical to something your skin already produces and manages naturally. This is why it tends to be well-tolerated with low risk of irritation.
Typical use levels range from 0.5-5%.
Fragrance
Glyceryl Oleate has a function of "perfuming" in the CosIng database. This just means that the ingredient has some scent character that can contribute to the product's overall smell.
The scent of this ingredient is described as "waxy".
Fungal acne
As an ester of oleic acid, this ingredient may not be fungal acne safe. This is because oleic acid falls into the carbon-chain length that Malassezia can use as a substrate.
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