Royal jelly is a honey bee secretion that is used in the nutrition of the larvae. It is secreted from the hypopharyngeal glands in the heads of young workers and used (among other substances) to feed the larvae in the colony. Additionally, if a queen is desired, a chosen larva will receive large quantities of royal jelly as its only food source for the first four days of its growth. This rapid, early feeding triggers the development of queen morphology, including the fully developed ovaries needed to lay eggs. All larvae in a colony are fed royal jelly, but adult bees do not consume it at all A powder is a dry, bulk solid composed of a large number of very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms powder and granular are sometimes used to distinguish separate classes of material. In particular, powders refer to those granular materials that have the finer grain sizes, and that therefore have a greater tendency to form clumps when flowing. Granulars refers to the coarser granular materials that do not tend to form clumps except when wet.