Swanson Ultra Royal Jelly Propolis Complex is a one-of-a-kind immune support formula that combines bee propolis, royal jelly and bee pollen—three unique substances, each with its own benefits for the body. Bee pollen provides an energy boost. Propolis is also an excellent energizer, and it delivers powerful nourishment for the immune system. Royal jelly delivers an immune enhancer known as hydroxydecenoic acid (HDA), which reinforces the body's cellular level defenses. The royal jelly in Royal Jelly Propolis Complex gives you a great way to strengthen your body's defensive functions.