Is it cold enough for you in the Midwest?

A large hole in the sun's atmosphere is facing Earth and spewing a stream of solar wind in our direction. Polar geomagnetic storms are likely when the gaseous material arrives on Jan. 31st or Feb 1st. The Tax U More party [aka Democrats] will tell you that's just anthropogenic "climate change." They think humans are so advanced their consumerism and technology cause holes in the sun's atmosphere, but they are not smart enough to be considered human by the NY legislature.

Six things about Vitamin D, Harvard Medical School Health Beat

A number of factors influence a person’s vitamin D levels. Here are six important ones.

1. Where you live. The further away from the Equator you live, the less vitamin D–producing UVB light reaches the earth’s surface during the winter. Residents of Boston, for example, make little if any of the vitamin from November through February. Short days and clothing that covers legs and arms also limit UVB exposure.

2. Air quality. Carbon particles in the air from the burning of fossil fuels, wood, and other materials scatter and absorb UVB rays, diminishing vitamin D production. In contrast, ozone absorbs UVB radiation, so pollution-caused holes in the ozone layer could end up enhancing vitamin D levels.

3. Use of sunscreen. Sunscreen prevents sunburn by blocking UVB light. Theoretically, that means sunscreen use lowers vitamin D levels. But as a practical matter, very few people put on enough sunscreen to block all UVB light, or they use sunscreen irregularly, so sunscreen’s effects on vitamin D might not be that important. An Australian study that’s often cited showed no difference in vitamin D between adults randomly assigned to use sunscreen one summer and those assigned a placebo cream.

4. Skin color. Melanin is the substance in skin that makes it dark. It “competes” for UVB with the substance in the skin that kick-starts the body’s vitamin D production. As a result, dark-skinned people tend to require more UVB exposure than light-skinned people to generate the same amount of vitamin D.

5. Weight. Body fat sops up vitamin D, so it’s been proposed that it might provide a vitamin D rainy-day fund: a source of the vitamin when intake is low or production is reduced. But studies have also shown that being obese is correlated with low vitamin D levels and that being overweight may affect the bioavailability of vitamin D.

6. Age. Compared with younger people, older people have lower levels of the substance in the skin that UVB light converts into the vitamin D precursor. There’s also experimental evidence that older people are less efficient vitamin D producers than younger people.

Don’t see a link, but this is on their e-mail newsletter. http://www.health.harvard.edu/

http://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/

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Great Grandma's sunscreen

It was called common sense coverage.



Gardeners, golfers, sunbathers and tanning salonistas need to know: Skin cancer is the most commonly occurring cancer in the United States and accounts for about 2% of all cancer deaths. In 2005, about 59,580 individuals in the United States were expected to develop melanoma and approximately 7,770 (62,000 and 7,900 in 2006) were expected to die of it. (JAMA and Proc Natl Acad Sci USA) Melanomas are often resistant to radiation therapy and to many chemotherapeutic agents. That's a huge price to pay for being fashionable.

The next time you hear reports of how many soldiers have died since 2003 in Iraq, ask yourself about these preventable deaths. Twice as many in 1/4 the time.

Update: In Tara Parker Pope's column (WSJ, June 5) she reports that a white cotton t-shirt is almost no protection, and even less if wet. A green t-shirt offers 50% more skin protection than white, but even that is only an SPF of 10. You can buy clothing treated with sun block. Rit Sun Guard is a laundry additive which increases the UPF rating to 30 and lasts for 20 washes.