X 上的Mai：「Once your vitamin C serum oxidised it will no longer be effective......the period if I'm not mistaken is up to 4 months after opening until the vitamin C serum oxidised.
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![product question] is this oxidized? It has been this color since I first opened it but it looks pretty dark? Ok to use? : r/SkincareAddiction](https://i.redd.it/product-question-is-this-oxidized-it-has-been-this-color-v0-pejbu25gtv6a1.jpg?width=3024&format=pjpg&auto=webp&s=bc8b4aa4d94bf32968fa2bd3a372fc43dd0af1a1 "product question] is this oxidized? It has been this color since I first opened it but it looks pretty dark? Ok to use? : r/SkincareAddiction")
product question] is this oxidized? It has been this color since I first opened it but it looks pretty dark? Ok to use? : r/SkincareAddiction
![product question] is this oxidized? It has been this color since I first opened it but it looks pretty dark? Ok to use? : r/SkincareAddiction](https://i.redd.it/product-question-is-this-oxidized-it-has-been-this-color-v0-n5jfq25gtv6a1.jpg?width=3024&format=pjpg&auto=webp&s=c53685dc976afea007c7474d3a241ce32479f8e1 "product question] is this oxidized? It has been this color since I first opened it but it looks pretty dark? Ok to use? : r/SkincareAddiction")
product question] is this oxidized? It has been this color since I first opened it but it looks pretty dark? Ok to use? : r/SkincareAddiction
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Luxe Organix Philippines 🇵🇭 on Instagram: "Oxidized Vitamin C? We don't know her! 🤷♀️ Our Power Glow Serum, made for brightening your skin, now has a NEW & IMPROVED FORMULA! 💯 Swipe
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![Product Question] Is this Mad Hippie Vitamin C Serum oxidized? : r/SkincareAddiction](https://preview.redd.it/c6xt9vyi7ux21.jpg?auto=webp&s=18a56e69d5da682b9a9b9bfb4c356ed36621fa34 "Product Question] Is this Mad Hippie Vitamin C Serum oxidized? : r/SkincareAddiction")