請問這是合成脂嗎?
可能有高度致粉刺http://www.ezskin.com.tw/news/news_03.aspx?ArticleID=235
16-methylheptadecanoic acid, also known as isostearate or (+)-isostearic acid, is a member of the class of compounds known as long-chain fatty acids. Long-chain fatty acids are fatty acids with an aliphatic tail that contains between 13 and 21 carbon atoms. Thus, 16-methylheptadecanoic acid is considered to be a fatty acid lipid molecule. 16-methylheptadecanoic acid is practically insoluble (in water) and a weakly acidic compound (based on its pKa). Within the cell, 16-methylheptadecanoic acid is primarily located in the membrane (predicted from logP). It can also be found in the extracellular space. 16-Methylheptadecanoic acid is found in animal foods. 16-Methylheptadecanoic acid is found in meats, liver and fat. C18H36O2. https://pubchem.ncbi.nlm.nih.gov/compound/Isooctadecanoic_acid#section=Top
脂肪酸 也是個容易致粉刺的類別
致粉刺指數5
資料來源https://skinsalvationsf.com/comedogenic/
高度致粉刺成分
https://www.be-smooth.com/2017/02/16/comedogenic-ingredients-grain-salt/
MF: C18H36O2 MW: 284.5g/mol