Olive oil is very beneficial for health, and of course we will always remain moderate.
In cooking, in salads, or in the morning with honey, this oil, coming from a blessed tree as mentioned by the Prophet ﷺ, can only be beneficial.
What the science says: olive oil and olive leaf
What published research says about the remedies mentioned above, for context only — the studies address material causes, while healing belongs to Allah.
Olive oil and olive leaf
"Eat olive oil and anoint yourselves with it": a 2022 meta-analysis links olive oil consumption to a lower risk of cardiovascular disease, type 2 diabetes, and mortality (Clin Nutr, 2022). Olive leaf, for its part, has shown an effect on blood pressure and metabolic profile in prehypertensive individuals (PeerJ, 2021) (Phytomedicine, 2011). Precaution: olive leaf extract potentiates antihypertensive medications — monitor your blood pressure and talk to your doctor.