doTERRA essential oil is carefully and thoroughly tested using the strict CPTG Certified Pure Therapeutic Grade® quality protocol. Nourish Blend is using a mixture of frankincense, lavender, sandalwood, helichrysum and myrr to be added to the normal skin routine before going to bed. Nourish blend helps to nourish the skin and protects against anti-aging. Please refer to the link below for further information http://joshealthcorner.blogspot.sg/2010/09/myrrh-sandalwood-and-frankincense-top.html?m=1 Comes in a 15ml roller bottle. Bottle if returned to seller will get $1 refund for the next purchase. Also selling other types of blends for different uses. PM me for the price for other blends if interested!