Which oil is specifically advised against for individuals with high blood pressure?

Rosemary essential oil is particularly advised against for individuals with high blood pressure due to its stimulating properties. It can potentially raise blood pressure levels and lead to increased heart rate, which is concerning for those who already have hypertension. This stimulating effect is attributed to the presence of certain compounds in rosemary, such as camphor and 1,8-cineole, which can be invigorating and may not be suitable for those needing to manage their blood pressure.

When considering the other oils listed, lemon oil is known for its uplifting properties and is generally safe for individuals with high blood pressure. Cypress oil is often used for circulation and has a calming effect on the body, making it suitable for those with hypertension. Marjoram oil is also considered to have a soothing and calming effect, making it appropriate for those managing high blood pressure. This understanding underscores the importance of choosing essential oils based on their specific effects on the body, particularly for individuals with pre-existing health conditions like hypertension.