Pure rosemary essential oil is naturally anti-fungal, anti-bacterial and antiseptic, so it makes an excellent preservative in natural skin care products and it also makes an excellent skin tonic for any kind of skin conditions that are caused from excess bacteria or congested pores. While you can use it in skin care products you never want to apply it directly to the skin in undiluted form; it's much too strong and much too concentrated and can cause irritation. Rosemary essential oil has actually been shown to be effective in treating scalp conditions as well including hair loss and dermatitis of the scalp. To use rosemary essential oil on the skin or the scalp you can dilute it with water or use it with a carrier oil like jojoba or sweet almond oil. Rosemary essential oil can be a little bit hard to find but you should be able to find some great natural moisturizers and shampoos and hair treatments that do contain rosemary essential oils. So it's something to look for in your natural beauty products.