Medical, pharmaceutic and life science content is often so complex, that a reader whose primary language it is written in, but who is unfamiliar with the subject matter, cannot fully understand it. Editing this type of content requires not only a native English speaker, but one who is an expert in the field and understands the content. We offer a post-doctoral proof-reading service provided by a native English speaker for medical/pharmaceutic/life science content written by non-native English authors. Our services are provided by native English post-doctoral medical research scientists. The A4.Helix English proof-reading service will edit your medical, pharmaceutic and scientific content to the same standard as a native English-speaking expert in the field.