KehphilEssentia Rosemary Oil is obtained by steam distillation of Rosmarinus officinalis L. herb. Rosemary essential oil has a lot of great uses, too! It's often used to promote hair growth and prevent hair loss. It can also be used to improve memory and cognitive function. And just like peppermint oil, it can be used to help with digestion and nausea. It's also thought to be helpful for relieving stress and improving circulation. Some people even use it to boost their mood and energy levels. It's worth noting that rosemary oil is usually safe to use topically or aromatically, but it can be irritating to sensitive skin, so it's best to do a patch test first.