Welcome to this week’s Health and Fitness. This is an Open Thread.
Scientists find why “sunshine” vitamin D is crucial
(Reuters) – Vitamin D is vital in activating human defences and low levels suffered by around half the world’s population may mean their immune systems’ killer T cells are poor at fighting infection, scientists said on Sunday.
The findings by Danish researchers could help the fight against infectious diseases and global epidemics, they said, and could be particularly useful in the search for new vaccines.
Vitamin D Pills May Prevent Fractures in Older Adults
Vitamin D supplements may help prevent fractures in people over 65, provided they take enough of the right kind. A new review of clinical trials appears to show a strong dose-dependent effect for vitamin D in lowering the risk for nonvertebral fractures in the elderly.
Aging: Vitamin D Levels Tied to Dementia Risk
Low blood levels of vitamin D may be associated with an increased risk for dementia, a British study has found.
The Claim: Sunscreen Prevents Vitamin D Production
Dermatologists routinely talk of the need to wear sunscreen. But the body needs sunlight to produce vitamin D, a crucial nutrient.
So is it possible that wearing sunscreen might interfere with the synthesis of vitamin D?
Yes. Studies have found that by blocking ultraviolet rays, sunscreen limits the vitamin D we produce. But the question is to what extent.
Vitamin D is a fat soluble vitamin that is stored in the body’s fatty tissue. It aids in the absorption of calcium and regulate the amount of calcium and phosphorus in the blood. The few food sources for Vitamin D are cheese, butter, cream, fortified milk (all milk in the U.S. is fortified with vitamin D), fish, oysters, fortified cereals and margarine. Anyone remember cod liver oil?
Vitamin D is also known as the “sunshine vitamin” because the body manufactures the vitamin after being exposed to sunshine. Ten to 15 minutes of sunshine 3 times weekly is enough to produce the body’s requirement of vitamin D. However, many people living in sunny climates still do not make enough vitamin D and need more from their diet or supplementation.
Too much Vitamin D can cause an increase of calcium in the blood that can result in an increase of calcium deposits in soft tissue such as the heart and lungs that reduces their ability to function. It can also cause kidney stones, muscle weakness and vomiting.
Too little Vitamin D can cause osteoporosis in adults and Rickets in children.
The tables for taking Vitamin D supplement can be found here
Dietary Supplement Fact Sheet: Vitamin D. However, before taking a Vitamin D supplement you should consult your doctor and or a nutritionist.
As is now custom, I’ll try to include the more interesting and pertinent articles that will help the community awareness of their health and bodies. This essay will not be posted anywhere else due to constraints on my time. Please feel free to make suggestions for improvement and ask questions, I’ll answer as best I can.