Life Choice® Thymus Gland also has Vitamin B6 (P5P) and Zinc Picolinate. B6 deficiency has been linked to thymic atrophy and reduced antibody production, while increased B6 enables the body to absorb thymus hormones. Zinc is included because it is the keystone molecule for thymic proteins, which are immune substances made in the thymus gland – no zinc, no immunity.