Vitamin D Lowers Breast Cancer Risk in Hormone Users

Current vitamin D supplementation was associated with a 26 % decrease in
postmenopausal breast cancer risk in menopausal hormone therapy (MHT)
users, but there was no association in MHT nonusers.
[Am J Clin Nutr. 2015 Oct;102(4):966-73 51051 (12/2015)] PubMed Abstract -
Kirk's Expert Interview -

COMMENT: Vitamin D3 can be taken safely at 5000 IU per day. Measure the vitamin
D3 level after one month. Optimal levels, though debated, range from 40-70 ng/ml. If you
are in California, or another sunny local, it is still easy and common to be vitamin D deficient
(<20 ng/ml) because people avoid the sun and work indoors. I am a believer in daily
non-burn sunlight (avoid the pink!) as a way to optimize vitamin D and hormones
related to sun exposure. In fact, in about 30 minutes at lunchtime I will be doing
my 12 minute yoga in the sun and lay down for 5 minutes a side...AGAIN "no burn"
sunlight is what I'm talking about.

Be and Stay Well,


You can call me for "brief" medical questions 8-9 a.m. PST Monday thru Friday

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