Industry
Jun 5, 2026
PEI Enters a New Phase - with new composition, proven course and vital portfolio
The founder of PEI (Pandora Endocrine Innovation), Herjan Coelingh Bennink, is a driven man. For decades, he and his team have been convinced of the positive power of estrogen. His major messages at this moment: “Breast cancer is caused by progesterone, not by estrogens” and “estrogens including the new natural estrogen Estetrol (E4) can be used for the treatment of breast cancer.” Estetrol is now marketed as the estrogen component of an oral contraceptive pill and will become available for postmenopausal estrogen therapy later this year. Also this year, PEI is getting a new management team that is steering the proven course of the company with a vital portfolio.
