However, before I get to the study... the answer to my riddle from last week...
If you've tried to guess -- or even better, posted an answer -- to the riddle, the answer, as a couple of commenters have figured out, was water... the letters "H to O" were listed on the barrel.
I got this from an interactive story app I downloaded on my iPhone to read with my oldest son last year while he was learning to read. That was a tough one for us.
Well, on to discuss this study on vitamin D, where the goal was to estimate the reduction in mortality rates for six geopolitical regions of the world under the assumption that serum 25-hydroxyvitamin D (25(OH)D) levels increase from 54 to 110 nmol/l (21.6 ng/mL to 44 ng/mL).
To make a long story short, the results showed a reduction in "all-cause mortality rates" ranging from 7.6% for African females to 17.3% for European females. Reductions for males averaged 0.6% lower than for females. The estimated increase in life expectancy is 2 years for all six regions studied.
Considering the low cost of vitamin D supplements, or the fact that "smart" exposure to UVB rays from the sun is free, it's one of the easiest ways we can improve or maintain our health.
Most vitamin D experts are saying 5000 IU daily from supplements is what is needed to ensure the whole body has enough of this essential nutrient. Apparently, according to surveys, even those those doctors who take a cautious and conservative approach by only recommending 2000 IU/day for their patients, are taking 5000 IU/day themselves. Hmmm...
In the ideal situation, when taking large doses of vitamin D3 as supplements, you'll want to get a product that contains a little vitamin K2 as well, or in the absence of a D3 product that contains some K2, I would advise you take some K2 separately. This is because vitamin D increases the absorption of calcium by the intestines. Vitamin K2, will help maximize the calcium's benefit to bones, while minimizing the risk of calcium's undesirable side-effects like arterial calcification or kidney stones (as discussed in previous posts).
Source: An estimate of the global reduction in mortality rates through doubling vitamin D levels
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- Mom's Vitamin D Status During Pregnancy and its Effects on the Child
- Low Vitamin D Levels Linked to Low Semen Quality and Fertility Problems