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Gallic Acid Series
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Pharmaceutical Intermediates Series
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How Often to Use Azelaic Acid
壬二酸使用频率之论
凡用壬二酸,频率之定,关乎效与肤之应,不可不慎。初用者,肌肤未习,宜缓。可先间日一用,薄涂于肤,观其反应。若肌肤无不适,如刺、痒、红之症,再渐增频次。
待肌肤适之,或可增至一日一次。然油性肌肤,或可一日两次,以控油脂,且助其效显。但夜间用之,需防光,因日光或减其效,且增敏肤之险。
至于敏性肌肤,用前必行皮试。取少许涂于耳后或腕内,待时观察。若无异,始可用于面,且频率宜低,间二日一用为宜。观肤态,再酌变频率。
总之,壬二酸用之频率,依肤质、肤态而异,务以肌肤安且效佳为要。
+8615371019725
sales7@alchemist-chem.com
+8615371019725
Yana Yang
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