Ceramides
Ceramide
Judging from the properties of the ceramides possessed by the skin itself, the large molecular weight, non-soluble and non-polar ceramides can be stuck between the stratum corneum plates to protect the skin. However, such ceramides cannot be utilized from the point of view of topical skin care products because they cannot be dissolved by suitable solvents.

Therefore, the ceramides in skin care products are usually materials for the synthesis of ceramides, such as Sphingosine, Phytosphingosine or Glycosphingolipids. These materials are not directly converted into ceramides after being applied to the skin, but they are biocompatible with the skin and are allowed to be added to skin care products. However, there is not much in the literature on the specific role of these materials in the skin, and there is no clear evidence that their value goes beyond moisturizing.

In addition, the addition of ceramides in skin care products may not help whitening or anti-aging cells, because these activities are only possessed by ceramides in the active cells of the basal layer, and will not be directly transferred to the dead cuticle.
[1] 張麗卿,『我就是化妝品化達人』,健行出版社,2007/04/10。
[2] 張麗卿,『優質保養品選擇策略』,聯經出版社,2003/07/10。
[3] 邱品齊醫師,『神經醯胺 ( Ceramide ) 真相大公開』,SkinDoc Chiu\'s 化妝品嚴選菁華版,2009/02/12
y
2015-04-17
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神經醯胺的次種類有九種

s
2020-01-11
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這幾年市場上多了很多產品都宣稱添加神經醯胺
但看了一些產品之後發現很多產品細節其實都沒有說明清楚
到底哪一種產品比較有效?甚至是否真的值得買?
實在很難簡單評斷與選擇
我們人體角質細胞間脂質主要有三種成分所組成
神經醯胺、膽固醇與游離脂肪酸,統稱為生理性脂質
其中佔比最大的是神經醯胺大約佔了50%
於是就有人想到可以外用神經醯胺來加強保濕效果
但老實說並不是只要加了就會有效…
更不是加了就會有神奇夢幻的效果出現…

邱品齊-外用神經醯胺的六大疑問
https://skindocchiu.pixnet.net/blog/post/349259248-%E5%A4%96%E7%94%A8%E7%A5%9E%E7%B6%93%E9%86%AF%E8%83%BA%E7%9A%84%E5%85%AD%E5%A4%A7%E7%96%91%E5%95%8F

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