Here Comes the Sun – Getting Vitamin D Safely

 

Dr. Mercola says:

Safe sun exposure is essential for optimal health, but incorrect exposure can raise your risk of skin cancer while not providing any health benefits. Sunburn should be avoided at all cost. Detailed guidelines are provided for safely increasing your vitamin D stores through proper sun exposure are included.

While sunlight is composed of about 1,500 wavelengths, UVB is the only wavelength that will produce vitamin D when hitting unexposed skin. UVA’s increase your risk of skin cancer and causes photoaging of your skin. Therefore, it’s important to determine the ideal times of year for safe and effective sun exposure, and avoid exposure during times that UVB rays are not present. Instructions are included.

Vitamin D3 is an oil soluble steroid hormone that forms when your skin is exposed to UVB radiation from the sun (or a safe tanning bed). When UVB strikes the surface of your skin, your skin converts a cholesterol derivative into vitamin D3. It takes up to 48 hours for this vitamin D3 to be absorbed into your bloodstream to elevate your vitamin D levels. Therefore, it’s important to avoid washing your skin with soap after sun exposure.

In case you do develop a sun burn, immediately apply raw aloe vera. It’s one of the best remedies to help accelerate skin healing.

From a health perspective it doesn't make much sense to expose your skin to the sun when it is lower than 50 degrees above the horizon because you will not receive any valuable UVB rays, but you will expose yourself to the more dangerous and potentially deadly UVA rays. UVA's have a longer wavelength than UVB and can more easily penetrate the ozone layer and other obstacles (like clouds and pollution) on their way from the sun to the earth. UVA is what radically increases your risk of skin cancer and photoaging of your skin. So while it will give you a tan, unless the companion UVB rays are available you're likely doing more harm than good and should probably stay out of the sun to protect your skin.

UVa.’s One-Year Wonder

Wow. When will Google hire him?

Link: U-Va.’s One-Year Wonder – washingtonpost.com

David Banh, an 18-year-old from Annandale, just graduated from the University of Virginia in one year. With a double major.

His college education, almost entirely covered by a patchwork of scholarships, cost him about $200. And he sold back textbooks for more than that. Now he’s starting graduate study at U-Va. with a research grant.

He was helped by the fact that U-Va., as a public school, costs a lot less than most private colleges. And that the university accepted many of his Advanced Placement credits from high school; many of the most selective private schools wouldn’t. As it was, he doubled up on course credits and took more physics over the summer to finish his second major.

Still, "I’ve never seen anything like that before," said Donald Ramirez, professor and associate chairman of mathematics at U-Va.

"He’s one of a kind," said Vicki Doff, his counselor at the competitive magnet Thomas Jefferson High School for Science and Technology in Fairfax County. "Absolutely amazing kid academically, incredibly persistent, bright, focused and determined. His academic record was second to none. I’ve been here over 20 years, and I’ve never had a student take the course load he did in his years here."

She used to worry he was doing too much. "And he usually proved me wrong."

Banh was born and grew up in Fairfax, the eldest son of parents who came to the United States from Vietnam in the 1980s.

via Steve Pavlina