D. Rafael Juste Castán, Doctor of Medicine and Pharmacy and specialist in opthalmology, began the history of Juste when he moved his practice to Madrid. He founded one of the first Spanish companies dedicated to research, development and production of pharmaceutical products and active ingredients. At first, the company was specialized in opthalmology.
D. Rafael Juste Castán passed away at an early age. His widow, Dª. Inés Buil Cambra, became chairwoman of the company. D. Luis Juste Buil and Dª. Matilde Juste Buil join the board, together forming the company’s second generation, endowing it with great commercial progress