I think the most promising Vitamin for avoiding a cancer recurrence would be Vit. D at this moment. You are in Canada, so you might be a bit deficient.
Here's a post from Debbie L. to the Breast Cancer List (Hope it's okay to post it here, Debbie?) in which she expresses very well what I think about the issue.
If you open iTunes and go to podcasts, search NPR - it's the 7/20/09 edition
of "Your Health", where she talks to Michael Holick. I think you can do it
the other way 'round, from the NPR website also.
I'm listening to it again right now. Okay, 5-10 minutes of arms/legs, three
times a week. He hedges on that a bit with something like "probably enough
for most people". The hours are 10am to 3pm and in the spring, summer, and
fall. Obesity and aging decreases the amount of vitamin D made from sun
exposure. But he does say that even elders can make enough with the
recommended exposure a "couple of times" a week. This guy takes supplements
(including milk) of 2700IU's/day and plays tennis and cycles on the weekend
with sunscreen on his face only, and his levels are 50 to 60 whatevers.
Bathing suit on Cape Cod 15-20 minutes = 10 to 20 thousand units.
We've been covered up for thousands of years now, right? It's interesting
that we've somehow survived all this long time with this severe deficiency.
Again, while I am taking supplements and hoping this is making a difference
(I am pretty sure that it IS helping my achiness), I remain skeptical that
it's quite the magic bullet that some of the hype would have us believe.
And I also wonder if supplementation is the answer. I wonder if the reason
that some people's levels are so low has to do with some process in their
body - and if it's that process causing the diseases that are seen in
association with D deficiency. So that low D is a marker for whatever is
going on, rather than a cause in itself. I don't think we know that yet,
and it may be a different answer for each disease or condition.
There's loads of info in the archives of the Breast Cancer List:
http://bclist.petebevin.com/
Look for info from Maria Rose B. She has investigated Vit D a lot.
Love
Jacqueline