Vitamin D linked to reduced risk of lung cancer
“Increasing vitamin D status is associated with a significantly reduced risk of developing lung cancer, according to a new meta-analysis of existing data, with the greatest reductions in risk observed at 25(OH)D of nearly 53 nmol/L, and remained protective until approximately 90 nmol/L. Further increases showed no significant association with cancer risk reduction.”
As noted in my blog, and the vitamin D – E book, an ideal blood level of vitamin D is 50ng/ml. When we convert the 53nmol/L indicated above, (by dividing by 2.5) we end up with 21.2ng/ml, something considered way too low to be ideal. Yet, in this study, even that low level reduced lung cancer risk.
(Cancer Causes & Control (pp 1-10) First online: 10 September 2015. “Circulating 25-hydroxyvitamin D and risk of lung cancer: a dose–response meta-analysis.” Guo-Chong Chen, et al.)
Study links low vitamin D levels to rapid cognitive decline
Vitamin D deficiency is already associated with brain structural abnormalities, cognitive decline, and incident dementia. This new study from UC Davis and Rutgers University further confirms that link, establishing that vitamin D deficiency can have a “substantial” accelerating effect on cognitive decline in the elderly. In this case, vitamin D status was defined as insufficient, if blood levels were less than 20ng/mL.
“Low Vit D status was associated with accelerated decline in cognitive function domains in ethnically diverse older adults, including African American and Hispanic individuals who exhibited a high prevalence of Vit D insufficiency or deficiency.” (JAMA Neurol; September 14, 2015; “Vitamin D Status and Rates of Cognitive Decline in a Multiethnic Cohort of Older Adults.” Joshua W. Miller, PhD, et al.)
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