Some of the most powerful cancer-prevention tools are neither novel nor profitable.
Vitamin D is inexpensive. It is biologically active across immune, inflammatory, and cellular regulatory pathways. And according to randomized trial evidence, it saves lives — at scale.
The only real question left is why public health policy continues to ignore it.
https://open.substack.com/pub/petermcculloughmd/p/vitamin-d-could-prevent-30000-cancer