Despite the fact that the guidelines of the Endocrine Society (the world’s oldest and leading organization in the field of endocrinology and the study of metabolism) state that there is ‘minimal published experience’ about hormone treatment for people ‘prior to 13.5 to 14 years of age’,56 Olson-Kennedy and other colleagues seem extraordinarily confident about what they are doing, for example in her extraordinary dismissal not just of her opponents but of the irreversibility of the actions she is encouraging children to take.

