Are red-light face masks worth the hype?
红光面罩究竟是否名副其实？
Holed up at home when no one else is looking, people indulge in their covert, sometimes embarrassing, self-care routines. One of the newest involves donning a mask that would make the greatest movie villains envious. Strap it around the face, switch it on and ominous coloured light starts to emanate from the eye and mouth holes. All in the name of eternal youth and vitality.
当人们独自宅在家中、无人注视时，往往会沉浸于那些秘密而略显尴尬的自我护理仪式中。而最新流行的一种方式，是戴上一种连最经典的电影反派角色都可能羡慕的面罩。把它固定在脸上，打开开关，眼部和嘴部孔洞便会发出令人不安的彩色光芒——这一切都是为了追求“永葆青春”和焕发活力。
Light-emitting diode (LED) face masks are all the rage. Depending on the colour you choose, manufacturers promise they will rid your face of acne, reverse skin discolouration and even fight off wrinkles. The most popular is the red-light mask, which designers claim uses red and near-infrared (NIR) light to stimulate skin regeneration and reverse the signs of ageing.
LED（发光二极管）面罩正掀起热潮。根据所选光色的不同，厂商声称这些设备能清除痤疮、淡化色斑，甚至抵抗皱纹。其中最受欢迎的要数红光面罩，设计者表示它通过红光和近红外光（NIR）刺激皮肤再生，逆转衰老迹象。
The claims are more than marketing hype. Red light has the longest wavelengths in the visible spectrum, and as such can safely penetrate deeper into the skin than light with shorter wavelengths. The light then stimulve molecules called chromophores in subsurface layers of skin, which encourage the growth of cells called fibroblasts. These are among the first to respond to injuries or damage to the skin, and they are responsible for the production of two skin-proteins, collagen and elastin. High amounts of collagen are important for youthful-looking skin, boosting the skin’s elasticity and firmness.
这些说法并非只是市场炒作。红光是可见光谱中波长最长的光，因此它能比短波光更安全地深入皮肤底层。红光能够激活皮肤下层的感光分子（chromophores），从而促进一种名为成纤维细胞（fibroblasts）的生长。成纤维细胞是皮肤在受损或受伤时最先做出反应的细胞之一，负责合成两种重要的皮肤蛋白：胶原蛋白和弹性蛋白。胶原蛋白含量越高，皮肤越显年轻，弹性与紧致度也会显著提升。
10个月宝宝每天需要喝多少奶粉？
