蕁麻Nettle 生長在溫帶或熱帶地區的荒地中，可達2~4米高，鋸齒型的葉子和白黃色的花朵，莖葉上的螫毛有毒性，一旦碰上就會感到刺痛發癢，嚴重會燒傷、紅腫等。它在民族療法中，已被用來做為利尿劑、治療關節炎、風濕病，並且也能改善油性頭髮及治療頭皮屑。
螫毛的刺痛感是由幾個植物的化學物質所引起，包括甲酸、血清素和膽鹼。除了這些，蕁麻Nettle 含有豐富的礦物質、維生素B、蛋白質、葉綠素、胺基酸、卵磷脂、類黃酮和維生素等等，並且具有抗病毒的作用。
它還能改善攝護腺肥大(BPH)，BPH是男性在40歲過後最常見的疾病，事實上它與雄性激素和雌性激素在體內的平衡有很大的關係，雄性激素在5a還原酶的作用下，轉化成雙氫睪固酮。而蕁麻可抑制睪酮轉化為二氫睪酮(DHT)。還相應指出，DHT對頭皮有很大的影響，研究證明，蕁麻能阻止睪酮轉化為DHT。美國專利也提出蕁麻能治療異常落髮。
相關產品：
維髮健高植萃鋸棕櫚強化配方養髮液
主要成分為鋸棕櫚及蕁麻
相關資訊：
Nettle, or stinging nettle, is a perennial plant growing in temperate and tropical wasteland areas around the world. The plant has been naturalized in Brazil and other parts of South America. It grows 2 to 4 meters high and produces pointed leaves and white to yellowish flowers. Nettle has a well-known reputation for giving a savage sting when the skin touches the hairs and bristles on the leaves and stems. The genus name Urtica comes from the Latin verb urere, meaning 'to burn,' because of these stinging hairs. In folk medicine nettle plants have been used as a diuretic, to build the blood, for arthritis and rheumatism. Externally it has been used to improve the appearance of the hair, and is said to be a remedy against oily hair and dandruff.
The stinging sensation of the leaf hairs is caused by several plant chemicals including formic acid, histamine, serotonin, and choline. In addition to these chemicals, nettle leaf is rich in minerals, chlorophyll, amino acids, lecithin, carotenoids, flavonoids, sterols, tannins and vitamins. The root of the plant has other chemicals such as scopoletin, sterols, fatty acids, polysaccharides and isolectins. Several of nettle's lectin chemicals have demonstrated marked antiviral actions.
BPH, the most common disease of the prostate that generally affects men starting from the age of 40, actually occurs on a hormonal level. Androgens like testosterone as well as estrogens have been shown to cause BPH in animal studies. While testosterone plays a role in BPH, it is rather the conversion of testosterone to the extremely potent dihydrotestosterone that is the problem.
It also should be noted that these same androgen hormones have profound effects on scalp and body hair in both males and females. Hair loss in both men and women has been linked to excessive dihydrotestosterone (DHT) levels. While no clinical studies have been conducted yet on the use of nettle in treating DHT-related hair loss and male pattern balding, research does indicate that nettle root can prevent the conversion of testosterone to DHT. Interestingly, a U.S. patent has recently been filed on an herbal combination containing nettle root for the treatment of male pattern baldness. More research is sure to follow as this is a highly popular and profitable area of research.
http://www.rain-tree.com/nettles.htm#.VSaG0_mUfy9
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