Rosemary is such a common herb that we take it for granted; relegating it to roast chicken. It is a powerful and multi-faceted herb. Rosemary is known to be a brain function and memory booster; helpful for both students and elderly women. It is also a circulatory and nervine stimulant that has a toning and calming effect on digestion. If you have thinning hair, add rosemary essential oil to your shampoo to stimulate hair follicles and circulation to the scalp or make some strong rosemary tea and use as a hair rinse. Buy some fresh rosemary and try it out for yourself.