Rosemary essential oil is a good all rounder. A few drops in the bath are helpful after an illness as a pick-me-up and a tonic. Studies have shown that it may help memory, relieve mental fatigue and lethargy. Its a very useful oil to smell during exams and is also great to alleviate that Monday morning feeling. Because Rosemary has a warm, penetrating and stimulating odour it makes for a great muscle ease. Superb after sports activities - even more so when combined with Lavender and Marjoram. Dilute well in a carrier oil before skin application. Rosemary has also traditionally been used in skin and hair care. It's a good toner and can be rejuvenating for the scalp. You can add it to your shampoo - it makes an excellent rinse for dark hair and hair in poor condition.