Topical oleic acid (omega 9) weakens and destabilises the human skin barrier, resulting in decreased moisture retention, micro-fissures and inflammation, and heightened vulnerability to air pollution and other irritants.
You should never use it as a
topical treatment in isolation, unless you're prepared to sacrifice your skin to the cause of acne research, but you could easily combine it with a high linoleic acid, low
oleic acid
topical treatment like grapeseed oil, which would balance out the danger while preserving whatever benefits it may have like the sunscreen abilities.