As-salāmu ʿalaykum wa raḥmatullāhi wa barakātuh Is it allowed to drink olive oil every day in order to get the barakah, like it is stated in the hadith? Jazakallahu ghairan

The hadith is authentic: the Prophet ﷺ said, Eat olive oil and anoint yourselves with it, for it is from a blessed tree. So, yes you can consume olive oil moderately, however you should consult with a doctor in regards to how it affects your health.