Vitamin D & Breast Cancer

[vocalEK]

Just received via email:

A paper published by GrassrootsHealth found an 80% lower incidence of breast cancer in women with vitamin D levels of at least 60 ng/ml compared to women with levels below 20 ng/ml. Average blood levels of vitamin D in the United States are approximately 24 ng/ml, well below the scientists' recommended range of 40-60 ng/ml (100-150 nmol/L).

Higher Levels of Vitamin D Associated with Reduced Risk of Breast Cancer -- Again

A meta-analysis by Song et al. (2019) looked at the data of 70 observational studies, including the GrassrootsHealth study, and performed statistical analyses to determine if a relationship exists between vitamin D status and vitamin D intake and risk of developing breast cancer. Results indicated that vitamin D status was inversely related to breast cancer risk, but vitamin D intake from the studies included was not.

The combined results of 40 studies that reported vitamin D levels suggest a 6% lower risk of developing breast cancer for every 2 ng/ml (5 nmol/L) increase in blood vitamin D levels, with an even greater risk reduction from 9 studies in Asia.

From 15 studies reporting vitamin D intake, intake in increments of 400 IU/day was not found to be associated with a reduced risk for developing breast cancer; except in Asian and pre-menopausal women. The researchers attributed this association to higher levels of reproductive hormone in pre-menopausal women and a possible genetic variation in Asian women associated with breast cancer risk.

[ABC58]

Thanks that’s really interesting, I’ll look further x

[Iknitandstitch]

I have been taking vitamin D since 2007 as I was very much depleted of it and my levels increased significantly over a 3 month period - 2 tabs a day (I think I missed 1 dose 1 day in all that time) and still ended up with BC in 2017...

[vocalEK in reply to Iknitandstitch]

The "recommended" dose of 400 IU won't do anything to improve blood levels. Doctors will prescribe 800 IU, but that, still, is way too small a dose. According to this calculator, I need to be taking 5000 IU per day to increase my blood level to 60 ng/ml.

grassrootshealth.net/projec...

I currently take 5,000 IU of Vitamin D3 along with cofactors. Vitamin K2-MK7 helps vitamin D to route the calcium you take in to your bones and teeth instead of soft tissues. Magnesium is also needed. All are fat-soluable so it is best to take them after your fattiest meal.