Endocrine Therapy or hormone therapy is treatment that tries to block or reduce circulating estrogens, which is what drives majority of breast cancers. Dr Belinda Yeo is a Medical Oncologist at the Olivia Newton-John Cancer Wellness and Research Centre in Melbourne, who is researching the level of therapy that breast cancer patients require, to minimise toxicity in treatment. She was a guest speaker at the 2022 Breast Cancer Trials Annual Scientific Meeting, and we asked Dr Yeo to explain her research project on Endocrine Therapy.