Wikipedia: "Rosemary has been found to be a stimulant and mild analgesic, and has been used to treat headaches, poor circulation, and many ailments for which stimulants are prescribed.
It can be used as a disinfectant, as a mouth wash and to treat fever or rheumatism.
Externally it can be used in hair lotions; a few drops of Rosemary oil massaged into the scalp, then rinsed with an infusion of nettles can revitalize the hair. Used in this manner, it is supposed to prevent premature baldness. Rosemary is also reported to stop dandruff.
Health Precautions: In some cases, rosemary can cause autoimmune diseases. Rosemary in culinary or therapeutic doses is generally safe, however precaution is necessary for those displaying allergic reaction, or those prone to epileptic seizure. Rosemary essential oil is a powerful convulsant; if applied to the skin, it may cause seizures in otherwise healthy adults or children.[3] Rosemary essential oil is potentially toxic if ingested. Large quantities of rosemary leaves can cause adverse reactions, such as coma, spasm, vomiting, and pulmonary edema (fluid in the lungs) that can be fatal. Avoid consuming large quantities of rosemary if pregnant or breastfeeding."
I ate some crusty bread which contained rosemary and olive oil and I had an allergic reaction. My tongued burned terribly and my throat got tight. Now I know why I can't stand the smell of most organic shampoos, because they contain rosemary. And in fact when I've tried some on my scalp, I'd had an allergic reaction but didn't know why.
