There appears to be a link between vitamin D insufficiency (VDI) and early clinical failure in patients with follicular lymphoma, according to an observational prospective cohort study involving 642 individuals. : mdedge.com/hematologynews/c...
Yet another reason to have your vitamin D level checked to ensure it is in the normal range. It may or may not help slow our CLL progression (for which we await the results of the Mayo Clinical trial). However given the regular reports of members who found that they were low and felt less fatigued when they boosted their vitamin D, it's definitely worth checking!
From: ods.od.nih.gov/factsheets/V... 'Serum concentrations of 25(OH)D are reported in both nanomoles per liter (nmol/L) and nanograms per milliliter (ng/mL). 1 nmol/L = 0.4 ng/mL'
And from Table 1: '≥ 50 nmol/L or ≥ 20 ng/mL Generally considered adequate for bone and overall health
in healthy individuals', so you would mean 25 ng/ml serum level, though In the section Vitamin D and health, there's the statement 'Optimal serum concentrations of 25(OH)D for bone and general health have not been established' and they may well end up being different for those with CLL.
Note: '>125 nmol/L >50 ng/mL Emerging evidence links potential adverse effects to such high levels, particularly >150 nmol/L (>60 ng/mL)'
This emerging evidence (and the fact that the supplement dose needed varies with the individual), is why we need to work with our medical team when ensuring our serum levels are healthy. If we need to take capsules, D3 appears to be preferable given it is available without a prescription in the USA.
I presume your comment with regard to those with prostate cancer is to reduce the degree of osteoporosis from hormone therapy? There's a section on the role of Vitamin D with Cancer in the above article, but it doesn't go into detail, so perhaps you are able to provide a reference?
I don't think anyone knows what the connection is - do cancer cells use up vitamin D or does low vitamin D somehow encourage the development of cancer? Vitamin D is nowadays better classified hormone and there are receptors for it in most body cells.
I was surprised to see just how quickly my D value went from 21 two years ago at diagnosis to 55 at last blood test. The DR here is very low...but I take about 2700 iu daily. My CLL specialist takes 5,000 and my community HEM says she wants me to always maintain at least a 45 Ng/ML value. I think that eating a lot of vitamin K foods has helped me somewhat with the metabolism. And I see so many people taking extraordinary megadoses .....so absolutely I agree with you,Neil, that it really is best to have the-D Pow Wow with our doctors. I worry about any supplement's effect on other vitamin values and also what it does to liver functions.
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