What are benefits of royal jelly?

Unproven remedy: This contains a protein hormone that governs the maturation of queen bees. Like every other biological substance, it has a variety of different effects when introduced into various experimental systems. I haven't been able to find anything that makes me think it's anything more than an expensive placebo.

Many benefits: Royal jelly is a natural source of most vitamins ; Amino Acids ; has other interesting nutrients like enzymes ; growth factors. It has a long history of use in folk medicine as a general tonic. Some modern research validates at least some benefits. See http://www.Fao.Org/docrep/w0076e/w0076e16.Htm and http://www.Naturalnews.Com/040359_royal_jelly_cancer_prevention_disease.Html.