Olive oil is likely safe when taken appropriately by mouth or applied to the skin. Olive oil can be used safely as 14% of total daily calories. This is about 2 tablespoons (28 grams) daily. Up to 1 liter per week of extra-virgin olive oil has been used safely as part of a Mediterranean-style diet for up to 5.8 years.
Olive oil taken by mouth is well-tolerated. When applied to the skin, delayed allergic responses and contact dermatitis have been reported.
There is insufficient reliable information available about the safety of olive leaf, although so far olive leaf and fruit pulp have not been associated with significant side effects in clinical studies.
Olive trees produce pollen that can cause seasonal respiratory allergy in some people.
Special Precautions & Warnings:
Pregnancy and breast-feeding: There is not enough reliable information about the safety of taking olive products if you are pregnant or breast-feeding. Do not use amounts greater than the amount commonly found in foods.
Diabetes: Olive oil might lower blood sugar. People with diabetes should check their blood sugar when using olive oil.
Surgery: Olive oil might affect blood sugar. Using olive oil might affect blood sugar control during and after surgery. Stop taking olive oil 2 weeks prior to a scheduled surgery.