Nutrients fit for a Queen Bee Rapid release capsules Food Supplement Royal jelly is a secretion used by worker bees to feed and nourish their queens. Queen bees live exclusively on royal jelly which is thought to be responsible for their size and longevity. Nutrients fit for a Queen Bee Rapid release capsules Food Supplement Royal jelly is a secretion used by worker bees to feed and nourish their queens. Queen bees live exclusively on royal jelly which is thought to be responsible for their size and longevity.