Showing posts with label Dr. Holick. Show all posts
Showing posts with label Dr. Holick. Show all posts

Wednesday, February 18, 2009

Vitamin D: Benefits



Part II

Dr. Holick went to visit a woman in a hospital. The woman had a lot of bone pain, muscle pain and aches. She couldn't even walk. Dr. Holick recognized the problem right away. The lady was African American suffering from adult rickets: softening of the bones. He put her on a therapy of vitamin D and sun exposure. And, in fact, in a month/two, the lady was able to walk with a walker.

Here's something else.

African Americans have the highest death rate of any racial and ethnic group in the U.S. for most cancers," said Otis W. Brawley, M.D., American Cancer Society chief medical officer.

And YET, research is showing that vitamin D helps lower the risk of many cancers including prostate, breast, and colon. The Cancer Recovery Foundation claim that vitamin D helps reduce certain cancer by 77%. The Vitamin D Council goes so far as to say that prostate cancer IS a vitamin D deficiency that people just are not aware of!

I really wanted to understand this.

Bursting forth from the hot sun are invisible rays: UVA, UVB, and UVC. The UVB ray is considered the "burning" ray, but it also causes our bodies to make vitamin D.

So, I'm outside. The UVB ray hits my skin, and a flurry of activity begins. A certain type of cholesterol goes through a series of transformation that results into an active form of vitamin D. (It's D3)

And why exactly do I want this?

It definitely makes us feel good. And as we're learning, vitamin D helps with calcium absorption. It helps regulate melatonin-the hormone that causes us to fall asleep. But the really amazing part is that it helps regulate cell growth, in the prostate, breast, colon, and other tissues. And that may be why vitamin D helps combat cancer. (B/c cancer is growth out of control)

Unfortunately, many African Americans are deficient in vitamin D. The NHANES(National Health and Nutrition Examination Survey) found that among African American women in their child-bearing years, 42% were vitamin D deficient. (Next was Mexican Americans, and then Caucasions who were low by only 4%.

Well, considering that African Americans have a natural barrier called melanin against the sun, and that SPF can block up to 95% of UV rays, it's understandable why many of us may be vitamin D deficient.

However, despite the benefits of sunlight, many of us shy away from it...

G-d bless!

http://www.webmd.com/prostate-cancer/news/20050218/vitamin-d-may-lower-prostate-cancer-risk

http://www.miamiherald.com/277/v-print/story/503619.html

http://www.whfoods.com/genpage.php?tname=nutrient&dbid=110

http://www.cdc.gov/nutritionreport/pdf/nr_ch2b.pdf

http://www.vitamindcouncil.org/newsletter/2006-aug.shtml

Vitamin D: Do African Americans Wear Sunscreen?

I've been reading about vitamin D and expected to read about the benefits of the vitamin. Y'know, the usual. But I realized that it was much bigger deal than I could have imagined, so I figured I would break this topic up into parts.

Part I. Do Black Folks Wear Sunscreen?

The last time I watched Oprah, I remember her mentioning that she wears sunscreen. I use to always wonder if black folks wore sunscreen. It was always a source of embarrassment for me. Hey, you're dark, why are you wearing it? Also, I knew some black people who didn't want to be out in the sun for fear of getting darker. Y'know, try to stay as "light" as you can. The times I would wear sunscreen, I preferred not having my friends know b/c once they did, they snickered at me.

But, hey, I didn't want to get skin cancer! Even black folks gotta be careful!

And yet...I came across an article commenting that are thousands of Africans living in the hottest, sunniest places for years upon years, and yet they are not falling left and right from sun exposure. What gives?

Well, there are three things to know:
1. Sunlight is a natural nutrient that allows us to produce vitamin D in our bodies.
2. Sunscreen is truly effective. The weakest sunblock of SPF 8-15 can block out UV rays by 95%!
3. People with dark pigmentation have a natural barrier, called melanin, against the sun. Depending on the skin tone, according to Dr. Micheal Holick, we basically have a natural SPF of 15-30%

The problem here is that many people, especially those with darker skin tones are deficient in vitamin D. And in my readings, I've learned that vitamin D does more than help our bodies absorb calcium. MUCH MORE!

Much of the info given over comes from Dr. Micheal Holick, a heavy weight in vitamin D studies. He is Professor of Medicine, Phsiology, and Biophysics at the Boston University School of Medicine. And he (among others) is correcting a lot of misconceptions about sunlight, which some people aren't too happy about. And you will soon see why...

G-d bless!