Alanna Collen

Alanna Collen is a British biologist and science writer with a doctorate in evolutionary biology from Imperial College London. Her book 10% Human makes the accessible but startling argument that we are only a tenth human — the rest of our cells are microbes — and shows how this inner ecosystem shapes health.

Collen was part of the team that first decoded the human genome at the Wellcome Trust Sanger Institute. Her writing translates frontier research on the microbiome into practical guidance on diet, immunity and the modern rise of chronic disease, reaching both scientists and general readers.