Absolutely disagree. Atleast on your point about not having enough content for an epq. I am in summer of year 11, preparing for A-levels and this topic has interested, so I decided to do some research on it— and there is a lot.
This post is two years old, but it’s worth iterating here. If you want the perfect beginners guide to Space Medicine, there is a phenomenal MOOC at Coursera by Duke University, that is totally free, accessible and interesting. It goes into the main problems with space flight, the engineering countermeasures we’ve developed and the future for Martian medicine. After that, there is a book called “Fundamentals of Space Medicine” by Gilles Clement which is a textbook that outlines the history of space life sciences, and space biology and more. It’s a good follow up to the MOOC, and has loads of content you could fit into an epq. However, since the book is a little dated (the final version is from 2011, and this field is rapidly growing), I advise you to read up on some more recent studies from arxiv.org and other journals.
I can’t deny, this is a majorly niche field however it does exist, and space industry is just getting its footing. Check out varda, if you’re interested in how pharmaceuticals and space interact.
I predict that in a few decades, there will be a lot more demand for this sort of stuff.