免费日韩片_欧美成人精品一区二区男人小说_国产乱码一区二区三区四区_国产精品国产三级国产aⅴ入口_成人看的污污超级黄网站免费_欧美一级在线免费观看_成人午夜免费无码福利片_国产乱人伦偷精品视频色欲_aaa少妇高潮大片免费看_国产精品1234_亚洲精品国产suv一区88_中文字字幕在线中文无码_精品亚洲区_午夜九九九_国产av国片精品jk制服丝袜_色综合亚洲_亚洲成av人片无码bt种子下载_欧美色就色_精品少妇的一区二区三区四区_男人用嘴添女人下身免费视频

“脫發(fā)”的秘密，不是頭皮中循環(huán)不通暢，不是毛囊堵塞，不是營養(yǎng)不良，也不是壓力太大。，而是你體內(nèi)的一種遺傳性激素。

Baldness blights the lives of millions of Americans, both men and women, young and old. If you're fighting hair loss, chances are you've heard - and possibly tried - every gimmick out there. When you're this desperate, it's easy to make a mistake that could end up costing you lots of hard-earned cash, or, worse yet, precious hair follicles you don't have to spare.

"As recently as 20 years ago, there was little medical science could do to halt the loss of hair due to hereditary hairloss," says Dr. Alex Khadavi, a board-certified dermatologist and hair-loss expert. "Today, it is possible to find effective natural treatments for hair loss, but first one has to wade through a sea of information and misinformation to find the treatments that work."

Don't fall prey to products that play on these hair-loss myths:

* Poor circulation causes hair loss. -Research shows that medications that increase blood flow to the scalp do not grow hair. As further proof to debunk this myth, Khadavi points out that hair transplanted to balding areas produces new hair growth, demonstrating that there is adequate blood flow to the area to support hair.

*Clogged follicles cause hair loss.- Clogged hair follicles lead to ingrown hair, not hair loss. Shampoos and other products designed to open scalp pores do not stop hair loss or promote regrowth of hair.

*Poor nutrition causes hair loss.- Healthy, well-nourished people still lose their hair and taking nutritional supplements will not regrow hair. There are many supplements for hair loss in the market but even if they have ingredients that have shown to be beneficial for hair loss one would have to take 20-30 pills a day to get enough of those ingredients to the hair follicles to make a difference.

*Stress causes hair loss.- Day-to-day stress does not result in hair loss, no matter how much you fight with your mate or how loudly your boss yells at you. Major stress like surgery or cancer could result in hair loss, but this is usually temporary and the hair will likely regrow without treatment once the stress has passed.

"Dihydrotestosterone (DHT)（二氫睪酮）is one of the main drivers of hair loss,"Khadavi says. Naturally found in males and females, DHT plays a key role in development of male characteristics for both men and women. Some men or women, however, have a genetic propensity for DHT to "attack" hair follicles, especially those on the top of the head. Over time, DHT causes the follicles to become thinner, shorter and weaker, and eventually stops them from regrowing new hair.

（來源：天星教育網(wǎng) 英語點津Jennifer編輯）

我要了解更多趣味百科知識