Alison, there's a known correlation between low vitamin D during puberty and prostate cancer in later life. More than one study has shown the link, in some cases by working back from lack of exposure to sunlight during teenage years rather than by having historic vitamin D readings. Professor Tim Oliver presented on this (and some other light hearted correlations that apply during puberty) at last year's Tackle Prostate Cancer conference.
There has been the suggestion many times that this could be a significant contributory factor in black men having a higher incidence of prostate cancer too, but there's been no research on that as a cause.
The causal link between vitamin D during puberty and prostate cancer is not known far as I know.
It's also worth mentioning, for anyone taking vitamin D supplements (and other anti-oxidants) and having radiotherapy, that there is a theoretical conflict, causing some people to suggest avoiding vitamin D during radiotherapy. One way vitamin D operates is to generate enzymes that mop up free radicals, which might otherwise cause DNA corruptions, which is one way to start cancer. Radiotherapy on the other hand works by generating loads of free radicals in order to corrupt DNA, and during that period you don't want to be trying to mop them up.
Edited by member 02 Nov 2020 at 08:19
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