There are many oils that contain over 25% oleic acid. These oils disrupt the skin barrier by causing moisture loss which results in flaking due to an overproduction of skin cells. This may not be seen to the naked eye.
The moisture loss causes a temporary swelling of the surface which makes you feel like you are hydrated. Continued use will degrade the skin barrier. If you were to be measured with a technical device accurately measuring hydration, it would show the skin is losing moisture and the feeling is only superficial.
In an acne skin these oils will result in breakouts. If there are too many skin cells it will clog the follicle. Acne skin cells are different to a normal skin. Their skin comes off in sheets rather than grains of sand which blocks the follicles.
Common oils that contain over 25% oleic acid are Olive Oil, Coconut Oil, Macadamia Oil, Almond Oil, Apricot Oil, Avocado Oil, Marula Oil and Argan Oil.
