Are the leaves from an olive tree poisonous to humans?

No, the leaves of an olive tree (Olea europaea) are not poisonous to humans. In fact, olive leaves have been used in traditional medicine for their potential health benefits, including antioxidant and anti-inflammatory properties. However, while they are generally safe, consuming large quantities may lead to mild digestive upset. It's always advisable to consult with a healthcare professional before using any plant for medicinal purposes.