Royal jelly is a honey bee secretion that is used in the nutrition of larvae, as well as adult queens. It contains a range of proteins, lipids, hormones, enzymes, minerals, vitamins and 10-Hydroxy-2-decenoic acid (10-HDA). It is used as a dietary supplement for a variety of conditions and to assist in the maintenance or improvement of general well-being, including anti-inflammatory, anti-tumor, and anti-microbial properties. It can also enhance the immune system and promote healthy, youthful looking skin.