Symplex® M is a whole-food supplement formulated to support men's endocrine health, particularly the testes, adrenal glands, pituitary, and thyroid. Introduced in 1965, it contains a proprietary Protomorphogen™ blend derived from bovine orchic, adrenal, pituitary, and thyroid tissues. These glandular extracts are processed to provide nucleotides and peptides that may support the corresponding human glands.