觀點:維生素D可以有效地降低血壓(圖)

時間: 2013-08-14

一項新的研究表明與服用那些抗高血壓的“假”藥丸(安慰劑)相比,維生素D補充劑能夠有效的降低被診斷爲患有高血壓的患者的血壓。

高血壓與維生素D不足有關係,但直到現在纔有很少的證據證明補充血液中的維生素的水平對血壓有影響。

健康:新的研究表明,維生素D補充劑能夠幫助降低血壓

今年冬天歐洲社會高血壓會議在倫敦召開,一項新的研究顯示了在五個月裏服用補充劑可以獲得直接的利益。

日照比日常飲食更能有效地補充其的固有水平,但是北歐的一些國家,比如英國在一年當中僅僅有七個月可以得到充足的紫外線.

調查者研究的項目是到霍爾斯特布羅醫院看病的病人,這所醫院坐落於北緯56度,幾乎與格拉斯哥和莫斯哥在同一緯度上。

一共有112名患者參加了他們關於維生素D初始水平的測量活動,之後的20周內他們將服用維他命D或者安慰劑(假藥丸,)。其中112人中的92個在調查的初期被發現維生素D的含量偏低。

研究人員發現那些每天服用75微克(準確的)維生素D的患者們顯示出中樞收縮壓的顯著性下降,測定的是接近心臟處的血壓。

當與服用安慰劑組進行比較時,服用維生素D的患者收縮壓下降6.8毫米汞柱,然而舒張壓下降1.7毫米汞柱。

高血壓是讀數超過140/90毫米水銀柱。第一個數字是收縮壓,相當於每次心跳過程中出現的波峯,而心臟舒張的度數是休止期和跳動期之間的壓力。

高血壓是引發心臟病和中風的主要危險性因素。

調查的領導者托馬斯拉爾森博士說“可能大多數的歐洲人都患有維生素缺乏症,並且他們中的大部分也患有高血壓”。

我們最終的研究結果表明如果高血壓患者同時患有維生素D缺乏症那麼他就可以從維生素D補充劑中獲益。

檢查:高血壓的度數是超過140/90毫米水銀柱

維生素D補充劑並不能治療這些高血壓病人,但是它會對高血壓患者有一定的幫助,特別是在冬天的那幾個月裏。

然而所面臨的非常大的壓力是這還只是小規模的研究,並且更大的研究需要更可靠的證據來證明才行。歐洲高血壓學會副總裁,來自格拉斯哥大學的Anna Dominczak教授說“直到現在,幾乎沒有有利的證據可以證明維生素D對高血壓的專利性。”

降低收縮壓是十分重要的,也是在實驗中研製的特效藥的主要作用。

這個只是一個初期的研究,所以他仍然需要得到證實,但是它卻是在針對維生素D水平含量較低的高血壓病患者治療的全面戰略中潛在的引人注目的一部分。

這種缺乏症和心血管疾病,糖尿病型號2,一些癌症和自身免疫條件有關,而且也與軟骨病有關,這種軟骨病的症狀是成年人的軟骨出現劇烈的疼痛。

獨立營養學家Carrie Ruxton說“身體供應的如此多的維生素D其實是來自日照,而不是我們吃的食物。然而,冬天的時候日照供應短缺,特別是地處北方的一些國家。比如英國,當春天到來的時候這些國家的人們體內的維生素D的含量已經降到很低的程度了。”

官方的數字表明在春天的時候大約25%的成年人的維生素D的含量會缺乏,並且他們中的大多數可以通過服用補充劑來獲益。在英國,食品標準局沒有推薦一個具體的服用維生素的日劑量,除非你是老人,孕婦,亞洲人,獲得的日照很少或者不吃肉或者炸魚,這些人被勸告服用每天10微克的劑量。

據說每天服用25微克的補充劑是不會產生危害的。

長期服用劑量過多的補充劑危害是身體回吸收了過多的鈣元素,這就可能會弱化人的骨骼並且對肝臟和腎臟有損害。

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Vitamin D supplements 'could cut blood pressure as effectively as some drugs'

Taking vitamin D supplements could cut blood pressure by as much as some drugs, claim researchers.

A new study shows supplements lowered blood pressure in patients diagnosed with hypertension - high blood pressure - compared with those taking ‘dummy’ pills.

Vitamin D deficiency has been linked with high blood pressure, but until now there has been little scientific evidence that topping up levels of the vitamin in the blood makes a difference.

Healthy: Vitamin D supplements could help lower blood pressure, new research indicates

A new study, presented at the European Society of Hypertension (ESH) meeting in London, shows direct benefits from taking supplements for five months in winter.

Sun exposure tops up natural levels more effectively than through diet, but northern European countries like theUKonly get adequate levels of UV light for seven months a year.

Around 90 per cent of the body’s supply of vitamin D comes from the action of sunlight on the skin.

Researchers studied patients visiting theHolstebroHospitalinDenmark, which is at the 56th Northern latitude - about the same latitude asGlasgowandMoscow).

Altogether 112 patients taking part had their initial levels of vitamin D measured, and then they were given either Vitamin D or a placebo (dummy pill) for 20 weeks. 92 of the 112 patients were found to have low levels of vitamin D at the start of the study.

The researchers found that those patients taking the vitamin D supplement of 75 mcg (correct) daily showed a significant reduction in central systolic blood pressure, blood pressure measured near the heart.

When compared to the placebo group, patients taking vitamin D had a cut in systolic blood pressure of 6.8 mmHg, while diastolic blood pressure was reduced by 1.7mmHg.

A high blood pressure reading is one that exceeds 140/90 millimetres of mercury. The first figure, the systolic pressure, corresponds to the ‘surge’ that occurs with each heart beat while the diastolic reading is the pressure in the ‘resting’ stage between beats.

High blood pressure is a major risk factor for heart disease and stroke.

Study leader Dr Thomas Larsen said ‘Probably the majority of Europeans have vitamin D deficiency, and many of these will also have high blood pressure.

‘What our results suggest is that hypertensive patients can benefit from vitamin D supplementation if they have vitamin D insufficiency.

Check: A high blood pressure reading is one that exceeds 140/90 millimetres of mercury

‘Vitamin D would not be a cure for hypertension in these patients, but it may help, especially in the winter months.

‘However, it is important to stress, that this was a small study, and that larger studies are needed to provide solid evidence.’ ESH Vice-President, Professor Anna Dominiczak ofGlasgowUniversity, said ‘Until now, there has been little evidence of benefit from vitamin D to patents with hypertension.

‘The reduction in systolic blood pressure was quite significant - this is what powerful drugs do in trials.

‘This is an initial study, so it needs to be confirmed, but it is potentially interesting as part of an overall strategy for managing hypertension in patients with low levels of vitamin D.’ Vitamin D supplements are available in two forms - vitamin D2 and vitamin D3 - with D3 being more active and effective.

Deficiency has been linked to cardiovascular disease, type 2 diabetes, several cancers, and autoimmune conditions as well as osteomalacia, which is the painful manifestation of soft bones in adults.

Independent dietician Dr Carrie Ruxton said ‘Vitamin D is unusual in that much of the body’s supply comes from sunlight rather than food. In winter, however, sunlight is in short supply, particularly in a northerly country likeBritainand blood levels of vitamin D can fall very low by the beginning of spring.

‘Official figures show around 25 per cent of adults are vitamin D deficient in the Spring and many would benefit from supplements.’ In theUK, the Food Standards Agency does not recommend a specific daily dose of vitamin D unless you are elderly, pregnant, Asian, get little sun exposure and eat no meat or oily fish when 10mcg is advised.

It says daily supplements of 25mcg are unlikely to cause harm.

The danger with taking excessive doses for long periods is that the body absorbs too much calcium, which could weaken bones and possibly damage liver and kidneys.

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第1樓 熱心網友 2013-08-14
富含各種維生素的食物表維生素名稱食物缺乏出現的症狀維生素A動物肝臟,奶與奶製品及禽蛋,綠葉菜類、黃色菜類及水果等。胡蘿蔔、西紅柿、柿子、雞蛋、牛肝和豬肝、魚肝油、牛奶、奶酪、黃油、西蘭花、菠菜、萵苣、大豆、青豌豆、橙子、杏、紅薯等 夜盲症、眼球乾燥,皮膚乾燥及痕癢(視黃醇)維生素B1穀物皮、豆類、堅果類、芹菜、瘦肉、動物內臟、小米、大白菜、發酵食品,胚芽、米糠和麩皮情緒低落、腸胃不適、手腳麻木、腳氣病(硫胺素)維生素B2動物肝臟如肝、腎、心,豬肉、小麥粉、羊腎、雞肝、大米、黃瓜、鱔魚、雞蛋、牛奶、豆類及某些蔬菜,如油菜、菠菜、青蒜等綠葉蔬菜嘴角開裂、潰瘍,口腔內粘膜發炎,眼睛易疲勞(核黃素)維...