Supports the Thymus Gland and Immune System. The health of the thymus gland is crucial to supporting your immune system. Naturally occurring nutrients in animal glands can help support the same gland in the human body. . The thymus extract Thymulus is made up of predigested components that are already broken down to be better absorbed and used by the body. . Thymulus also contains the popular Chinese herb astragalus which supports healthy immune system function.