She is widely recognized for her significant role as the editor-in-chief of the Tidsskrift for Den norske lægeforening (Journal of the Norwegian Medical Association), a position she held from 2002 to 2015. During her tenure, she became a prominent voice in the Norwegian medical community and in public discourse regarding healthcare, research ethics, and evidence-based medicine.
Haug trained as a physician and specialized in immunology. Prior to her editorial role, she worked clinically and as a researcher, including at Rikshospitalet (now part of Oslo University Hospital).
Beyond her work with the medical journal, Haug has been an active participant in public debate, often contributing columns and articles on various health-related topics. Her advocacy often focuses on critical thinking, transparency in research, and challenging medical fads or unproven therapies. She is considered an influential figure in promoting scientific integrity and ethical practice within medicine in Norway.