文章分類

所有文章【34】
- 多情幾餘恨 - 戰爭愛情故事【0】
多情幾餘恨 - 戰爭愛情故事【0】

閱讀排行榜

迴響排行榜

缺乏維生素D - 普遍又嚴重但容易補充

2008-06-20 08:44 ｜迴響：3｜點閱：6874

缺乏維生素D

普遍又嚴重但容易補充

維生素D是1922年發現的, 開始認為成人每天需要400單位, 才可以保持血液內的 “正常” 濃度在20 NG / CC以上, 以避免軟骨病. 醫學界對這個標準心安理得地過了八十年.

但最近發現有近半的成人, 血內維生素D都不到20 NG; 孕婦, 授乳婦, 嬰兒, 兒童, 及病人更低. 在產前, 產後的婦女, 就是每天吃孕婦多種維生素, 其中有400單位的D, 而且常常吃肥魚, 天天都喝兩杯以上的牛奶, 但婦嬰血內的維生素D, 多數仍然不到20 NG.

最近更發現維生素D在40 NG / CC以下的人, 容易患下列病症, 患後不容易痊癒, 併發症多, 死亡率高.

1.                  乳癌, 大腸癌, 前列腺癌, 淋巴腺癌, 皮膚癌, 肺癌. 據估計, 如把血維生素D的濃度增高到40 NG / CC, 可以把上述癌症的發病率減少60%

2.                  心臟血管病和中風.

3.                  高血壓.

4.                  糖尿病.

5.                  多發性神經炎.

6.                  風濕性關節炎.

7.                  精神病, 神經衰弱, 失智.

8.                  慢性疼痛.

9.                  跌倒.

10.              傷風感冒.

11.              停經後的婦女每天如只服1,200 MG 鈣片, 減少骨拆的功效很少, 但如把維生素Ｄ的劑量每天由400 MG 加倍, 骨折的人減少近半.

把血液中的維生素D增加到40 NG / CC以上的辦法有:

日曬: 我們所需要的維生素D, 九成來自皮膚內的膽固醇, 經日光紫外線照射而成. 在北方日曬較少的地方, 缺乏維生素Ｄ的人較多. 每天在日光下工作的人, 血內維生素D多在 50 – 70 NG / CC之間. 這可能是身上有毛, 但不穿衣服的原始人, 經百萬年演化出來的正常維生素D濃度. 人類近來的文明, 以室內生活為主, 日曬減少, 因而形成維生素D的缺乏. 現在據估計全球缺乏維生素D的文明人, 超過十億.

如果不穿衣服, 在日正當中的前後, 曬三十分鐘, 皮膚可以製造20,000單位的維生素D, 那等於200杯美國牛奶中的含量. 每天在日正當中的前後, 如日曬十五分鐘, 就是穿著衣服, 也可能製造足夠的維生素D.

但在文明的社會裡, 人多在室內工作, 衣冠楚楚, 就是在天天艷陽高照的沙漠以色列及沙地阿拉伯人, 缺乏維生素D的人, 也有兩成多. 下例情況, 也會減少皮膚製造維生素D:

1.                  穿厚衣服.

2.                  塗防曬油.

3.                  胖子皮下脂肪厚.

4.                  黑皮膚, 皮下黑色素防阻紫外線.

5.                  患牛皮癬等皮膚病.

6.                  玻璃窗擋阻了紫外線.

7.                  老人皮膚製造維生素D的功能下降.

日曬的副作用是皮膚變黑, 老化, 起皺紋, 及長皮膚癌.

晒太雖然會產生很多的維生素D, 但紫外線也會破壞維生素D, 使血內的維生素D平衡, 不可能升高中毒.

人工紫外線: 利弊和日曬一樣.

食物:人 體內的維生素D, 只有一成來自食物, 其中以魚肝油及肥魚中的含量最多, 奶類, 雞蛋, 及牛肝中也有. 美國的牛奶和早餐殼物 (Cereal) 中多加有維生素D. 但每人每天並不都吃這些食物, 如果又不曬太陽, 就會缺乏維生素Ｄ.

維生素D片: 如果要把血液內維生素D升高到 40 NG / CC, 但不願多曬太陽, 又不天天吃肥魚, 那就要天天口服維生素D片了.

1.      兒童: 每天400單位, 但需常常和日光接觸, 否則應加倍.

2.      成人: 每天800單位, 但需常常和日光接觸, 否則應加倍. 每粒多種維生素丸內只有400單位的維生素D.

3.      孕婦和授乳婦: 每天1,000 – 2,000單位, 視與日光接觸的多少而定.

4.      腸胃病, 腎臟病, 肥胖, 和同時服其他藥物會減少Ｄ吸收者, 量要增加.

服多了維生素D會中毒, 如引起腎結石等, 但這種病例很少, 多因服錯劑量而起. 中毒所需的劑量每天多在10,000單位以上, 經年累月而來.

你缺乏維生素D嗎? 除非你天天曬太陽, 否則機會很多. 你想証明, 可以抽血檢查維生素D的濃度, 然後再決定用不用口服. 不過在美國去掛號和化驗維生素D的費用, 比口服兩年維生素D所需的費用還高, 而且每天口服維生素D 1,000單位, 還沒有發現會中毒, 因此很多人都在開始服用.

維生素D在細胞內, 有免疫抵抗很多疾病的功能, 它和1950年代開始用大量維生素E治冠心病等, 及1960年代開始用大量維生素C治感冒等不同, 因這些功用都沒有得到醫學反複地証實過, 但維生素D的功能, 經過不斷地研究, 還沒有發現有否定的結果. 所以提供大家參考.

▲上一篇：冬令進補 – 該補甚麼?

▼下一篇：地震前的準備

加入書籤：

引用：http://blog.chinatimes.com/y3115y/archive/2008/06/20/290164.html

2008-06-20 08:44 ｜作者：姚毓霖｜分類：作家部落格｜迴響：3｜點閱：6874

迴響與引用列表

回應：缺乏維生素D - 普遍又嚴重但容易補充

Dear Dr. Yao & your readers:

I try to rewrite my response yesterday again.

Vitamin D is really a hormone than vitamin.

I live in Los Angeles and thought I should have enough sunshine 20-30 minutes per day between 10:00 AM to 3:00
PM. Last year, my wife and I took a blood test on vitamin D and turned out
my wife was near the the bottom and I was below the safe range.

We both take 1,000IU/day for over one year. Her test is in the middle of
safe range this year. I did not test again knowing I shall safe in range. However, the optimal shall be around 60 or so, if I remember correct.

FDA's 400 IU/day had absolutely no
scientific base. (I have learned jokes
from FDA or some other institutes that most people will accept without doubt.)

Most of us need about 1,000 IU/day of D3 (an easy absorb version) in supplement. To count on nature sunshine, there are many factors to be considered, it may not turn out as we wish for.
Daily exercise is important to us.

For cancer patients (especially colon cancer patient needs 2,000 IU/day or higher). (Openly consult with your doctor or contact others listed in this response for assistance.)

Under 5,000 IU/day shall not have
accumulated side effects for most people. (Dr. Yao is correct on that 10,000 IU/day.)

If we take D3 1,000 IU/day, we may reduce about 68% of having colon cancer.
I have cancer patient for referral on this matter.

As people's age progress, so are increasing opportunity of having cancer from more damage caused by incomplete cellular respiration. This is nature but we may retard its impact.

Vitamin D (D3) is one of the most
low cost supplements benefit to most people in a wide range of preventions of disease that was the reason William Faloon, M.D. (Editor of Lifer Extension Foundation) wrote to President Bush last Oct.. He suggested to provide free vitamin D (D3) to all US people to reduce the over all US medical cost. In the relational of his suggestion, a table of safe dosage was included. If your reader is interesting to review that letter and its relational, I will glad to provide an email copy to you.

Michael Hollick of Boston University
has conducted most extensive studies in
Vitamin D up today in my knowledge.

LATimes reported a latest study of D (released on June 10, 2008) shall be very educational for us. It was also on
radio talk show as I was told.

The real bone structure needs vitamin K (K2 an easier absorbed version) to have matrix protein to transfer Calcium to the structural portion of our bones. The myth of D or Magnesium & calcium is not very reliable. My suggestion keeps around 500 mg/daily maximum. Over intake of calcium will deposit at our vascular wall or other organs and leads to death.

My email address is "royyang@ca.rr.com".

Enjoy your writings and like to supplement some missing history.

2008-06-21 13:31 ｜ Roy Yang

回應：缺乏維生素D - 普遍又嚴重但容易補充

寶寶.

健康的孕婦和授乳婦, 除非每天曬太陽, 或吃魚肝油, 或吃肥魚, 每天多需1,000 – 2,000單位. 但魚肝油內也有維生素A, 多吃有副作用. 吃肥魚時, 應該知道它的汞含量. 日本人喜歡吃魚生魚片, 最近發現他們血內的汞增高.

2008-06-20 20:59 ｜姚毓霖

回應：缺乏維生素D - 普遍又嚴重但容易補充

HI Dr. Yang,

Would you please put your comment back? It was deleted by accident.

I appreciate your broad knowledge, and wish to communicate with you about future articles. Would you please give me your email address?

Thamk you.

Sincerely,

Yulin Yao, MD

2008-06-20 20:52 ｜姚毓霖