oak root/ quercus/ Quercus infectoria/ white oak bark
主要萃取自樹皮，萃取物成分中含水楊酸。據說使用在肌膚上有抗菌的效果，但亦有導致皮膚刺激的可能。
It is mainly extracted from bark, and the extract contains Salicylic acid. It is said that it has antibacterial effect on the skin, but it may also cause skin irritation.
ref.
paulaschoice.com
cosdna.com
skin+ app的保養品成分標籤掃描功能, 可以幫助妳尋找含有抗皺成分的抗皺化妝水