Olive Oil.

"I'd say olive oil do not do olive oil can actually worsen scalp itch scalp dandruff because the main player behind scalp dandruff and actually flares in your scalp psoriasis is this yeast called malassezia. The special yeast, when you add olive oil to the media, it grows in the lab and cultures malassezia. So I would say do not put olive oil onto your scalp for hair loss because that will just be fertilizer or food for the malassezia and it'll proliferate come down to your face even come down to your body."

"Olive oil is essentially a petri dish for malassia yeast. This is why it makes dandruff worse, this is why it makes sebic dermatitis worse, this is why it makes tinea versicolor worse. If you're using olive oil as a moisturizer, it's actually going to feed this yeast and make it worse. Olive oil as a solo ingredient has really no utility and no place on your skin for multiple reasons: pro-inflammatory, does not help the skin barrier, it is literally the food for this yeast."