The royal jelly had no effect on the leukemia cells, but it had dramatic effects on sarcoma cells. Royal jelly, however, has not lived up to expectations that it is an important anti-aging substance. But it is not without medical interest. Royal jelly consists of an emulsion of proteins, sugars, lipids and some other substances in a water base. Proteins make up about 13% of royal jelly. Most of the proteins comprise a family called major royal jelly proteins.
Cells were first discovered by Robert Hooke in 1663.
When did Robert Hooke discover cells? In 1665, Hooke, an English natural philosopher, published Micrographia, the first book to contain illustrations of the microscopic world. In the book, Hooke used the term cell to describe the microscopic structure of a thinly sliced piece of cork.