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Innovative solutions for health and wellbeing

Laboratorios LETI is a company with a global presence of reference in specialized segments of health and wellness, a leader through innovation and development of prestige products and brands.

75 years inspiring the future of Immunotherapy

LETI started its activities in the field of allergy in 1941 with the creation of the LETI Allergy Service, one of the first manufacturers in Europe to produce allergenic extracts. Since then, LETI has remained a leader in the field of allergology with numerous scientific publications and a long list of therapeutic innovations to its credit.


In 1919 Dr. Pedro Domingo Sanjuán, Professor of Microbiology at the Universidad Autonoma de Barcelona, Spain and researcher at the Municipal Laboratory of Barcelona, Spain founded the Laboratorio Experimental de Terapéutica Inmunógena (LETI) for the development and production of vaccines. Today immunology, preventive medicine and biological products continue to be the main cornerstone of the company, although its scope and its product range have diversified considerably.