頭髮一直也是不少人所關注的議題，而頭髮的生長，實情跟幹細胞(Stem cell)息息相關。562Please respect copyright.ＰＥＮＡＮＡ9gyZzyUvCy
562Please respect copyright.ＰＥＮＡＮＡJVFUfXyrmd
562Please respect copyright.ＰＥＮＡＮＡBfwW0p6cNw
（圖2）頭髮的生長，是由位於髮囊底部名為hair-follicle stem cells (HFSCs)的幹細胞產生出來。562Please respect copyright.ＰＥＮＡＮＡrG8R25bTjd
562Please respect copyright.ＰＥＮＡＮＡR6K7bx7F6x
562Please respect copyright.ＰＥＮＡＮＡuvoXGxRve3
這些幹細胞會不斷地進行三個階段的循環，分別為anagen、catagen以及telogen。562Please respect copyright.ＰＥＮＡＮＡ5ORbvAu7Di
562Please respect copyright.ＰＥＮＡＮＡs2H7iwfsOz
562Please respect copyright.ＰＥＮＡＮＡBHNJkC8iPG
（圖3）當anagen發生的時候，HFSCs幹細胞就會開始進行自我複製，經一系列的程序後便會導致毛髮生長;這階段可持續進行數年。562Please respect copyright.ＰＥＮＡＮＡI44pEYX0G4
562Please respect copyright.ＰＥＮＡＮＡJ2TgXv79qU
562Please respect copyright.ＰＥＮＡＮＡjHjTAHtiz8
而當到達catagen的時候，毛髮便會停止生長，但依舊維持原位。562Please respect copyright.ＰＥＮＡＮＡ7rF7ZeJyfK
562Please respect copyright.ＰＥＮＡＮＡ2xHXjOEgqr
之後便會進入telogan階段， HFSCs幹細胞進入「冬眠」狀態，不作任何複製舉動，而毛髮亦會因而自然地脫落。562Please respect copyright.ＰＥＮＡＮＡZLRpp9AUEl
562Please respect copyright.ＰＥＮＡＮＡJPEVTvJU0e
落入telogan階段後，幹細胞便會再度進入anagen階段，重新開始產生毛髮。562Please respect copyright.ＰＥＮＡＮＡ1jkDW82R5P
562Please respect copyright.ＰＥＮＡＮＡMmSyM2BbON
健康人士的HFSCs幹細胞，高達80-90%處於anagen，10-20%處於catagan，只有1-5%處於telogan階段。562Please respect copyright.ＰＥＮＡＮＡVeR5CXcvBm
562Please respect copyright.ＰＥＮＡＮＡxl45ooeqpv
由此可以推想出，脫髮或者禿頭的原因就是大多數的HFSCs處於catagan或telogan階段，並不再重返anagen階段。562Please respect copyright.ＰＥＮＡＮＡ95CRaAEY1j
562Please respect copyright.ＰＥＮＡＮＡFsLrdvNEGJ
下集將會講解為何壓力過大會導致脫髮，箇中的原理涉及荷爾蒙的改變，及幹細胞三階段的失衡。562Please respect copyright.ＰＥＮＡＮＡ8PfDIF7QcU
562Please respect copyright.ＰＥＮＡＮＡJf7wCBJWs4
562Please respect copyright.ＰＥＮＡＮＡ9Mnsvu1RJ7
562Please respect copyright.ＰＥＮＡＮＡnGZGcD0Gky
562Please respect copyright.ＰＥＮＡＮＡdARXuczVod
如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。562Please respect copyright.ＰＥＮＡＮＡeb34UOJsaG
562Please respect copyright.ＰＥＮＡＮＡb4fLJ44FwB
Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc562Please respect copyright.ＰＥＮＡＮＡuKIUw1LOY9
562Please respect copyright.ＰＥＮＡＮＡn6ilFJcXf0
同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。562Please respect copyright.ＰＥＮＡＮＡmjz3o71t6W
562Please respect copyright.ＰＥＮＡＮＡbYAyZ9ZoV4
Link:562Please respect copyright.ＰＥＮＡＮＡGiV9qd892a
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio562Please respect copyright.ＰＥＮＡＮＡkRGFKChcK5
562Please respect copyright.ＰＥＮＡＮＡU95rfJPyzm
562Please respect copyright.ＰＥＮＡＮＡSQ28X0bpjr
除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。562Please respect copyright.ＰＥＮＡＮＡLxY5Jz7oUe
562Please respect copyright.ＰＥＮＡＮＡsnnhpJotTA
Ref1:https://pubmed.ncbi.nlm.nih.gov/26763421/562Please respect copyright.ＰＥＮＡＮＡK58IUYEbCU
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