Nanorg
An organism artificially created that has self-replicating DNA generally designed in laboratory to perform a medical procedure or function. The procedure can be positive or negative as they could be used as a biological weapon (ie. Small Pox) that could be detrimental to the human species as a whole.
Pinto Industries has created a Nanorg that is capable of strengthening the epidermis not only stopping the aging process of the skin, but reversing the process to a specific youthfulness pre-programed in it's DNA. These Nanorg's are also self-replicating.