Sinclair Rodney D
Department of Dermatology St Vincent's Hospital, The Skin and Cancer Foundation of Victoria and The University of Melbourne, Victoria, Australia.
J Investig Dermatol Symp Proc. 2007 Dec;12(2):2-5. doi: 10.1038/sj.jidsymp.5650046.
Shiny hair with a smooth texture and clean-cut ends or tapered tips is generally perceived to be healthy. Hair texture and shine relate to hair surface properties, whereas the integrity of hair ends relates to the hair cortex. Hair can be straight, wavy or curly, blonde, black, brown, red, gray white, and its natural variations are important to our identity. Manipulation of the normal structure of the hair shaft is epidemic and dictated by culture, fashion, and above all, celebrity. Although cosmetic procedures are intrinsically safe, there is potential for damage to the hair. Loss of lustre, frizz, split ends, and other hair problems are particularly prevalent among people who repeatedly alter the natural style of their hair or among people with hair that is intrinsically weak. This may be due to individual or racial variation or less commonly an inherited structural abnormality in hair fiber formation. Hair health is also affected by common afflictions of the scalp as well as age-related phenomena such as graying and androgenetic alopecia. Hair products that improve the structural integrity of hair fibers and increase tensile strength are available, as are products that increase hair volume, reduce frizz, improve hair manageability, and stimulate new hair growth.
拥有光滑质地、发梢整齐或呈锥形的闪亮头发通常被认为是健康的。头发质地和光泽与头发表面特性有关，而发梢的完整性与头发皮质有关。头发可以是直的、波浪状或卷曲的，颜色可以是金色、黑色、棕色、红色、灰白色，其天然的多样性对我们的身份认同很重要。对发干正常结构的人为改变很普遍，并且受文化、时尚，尤其是名人的影响。尽管美容程序本质上是安全的，但仍有可能对头发造成损伤。光泽丧失、毛糙、发梢分叉及其他头发问题在反复改变头发自然造型的人群或本身发质脆弱的人群中尤为普遍。这可能是由于个体或种族差异，或者较少见的是毛发纤维形成过程中遗传的结构异常。头发健康还会受到常见的头皮疾病以及与年龄相关的现象（如头发变白和雄激素性脱发）的影响。市面上有能改善头发纤维结构完整性并增加拉伸强度的美发产品，也有能增加发量、减少毛糙、改善头发易梳理性并刺激头发生长的产品。
