![product question] when is vitamin C considered too oxidized that it's harmful? Details in comments : r/SkincareAddiction product question] when is vitamin C considered too oxidized that it's harmful? Details in comments : r/SkincareAddiction](https://preview.redd.it/f8d6yyu5u6j51.jpg?auto=webp&s=a14991d8e61bb33ce38f7e5c5bed75bb5d77d7fe)
product question] when is vitamin C considered too oxidized that it's harmful? Details in comments : r/SkincareAddiction
![Mai on Twitter: "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 Mai on Twitter: "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](https://pbs.twimg.com/media/DVr3JYsU0AEmN4h.jpg)
Mai on Twitter: "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
![The oxidation-reduction (redox) reaction of vitamin C, molecular forms... | Download Scientific Diagram The oxidation-reduction (redox) reaction of vitamin C, molecular forms... | Download Scientific Diagram](https://www.researchgate.net/publication/306111617/figure/fig2/AS:403296855576577@1473164871264/The-oxidation-reduction-redox-reaction-of-vitamin-C-molecular-forms-in-equilibrium.png)
The oxidation-reduction (redox) reaction of vitamin C, molecular forms... | Download Scientific Diagram
![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
![How bad is it to use oxidised Vitamin C product? When do you toss it out? [Product Question] : r/SkincareAddiction How bad is it to use oxidised Vitamin C product? When do you toss it out? [Product Question] : r/SkincareAddiction](https://preview.redd.it/o44doi719bvx.jpg?width=640&crop=smart&auto=webp&s=15ccb3f1278034c653739ac38f2e6e483ebad967)
How bad is it to use oxidised Vitamin C product? When do you toss it out? [Product Question] : r/SkincareAddiction
![VITAMIN C SERUM 15% 1oz. 30ml Skin and Face | Tri-Blend Formula with C Ferulic and Glutathione | Powerful Anti Oxidant Repair Serum for Erasing Wrinkles and Blemishes VITAMIN C SERUM 15% 1oz. 30ml Skin and Face | Tri-Blend Formula with C Ferulic and Glutathione | Powerful Anti Oxidant Repair Serum for Erasing Wrinkles and Blemishes](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/61sw-lQesyL.jpg)
VITAMIN C SERUM 15% 1oz. 30ml Skin and Face | Tri-Blend Formula with C Ferulic and Glutathione | Powerful Anti Oxidant Repair Serum for Erasing Wrinkles and Blemishes
![Foods | Free Full-Text | Different Effects of Vitamin C-Based Supplements on the Advance of Linseed Oil Component Oxidation and Lipolysis during In Vitro Gastrointestinal Digestion Foods | Free Full-Text | Different Effects of Vitamin C-Based Supplements on the Advance of Linseed Oil Component Oxidation and Lipolysis during In Vitro Gastrointestinal Digestion](https://pub.mdpi-res.com/foods/foods-11-00058/article_deploy/html/images/foods-11-00058-ag.png?1640683352)
Foods | Free Full-Text | Different Effects of Vitamin C-Based Supplements on the Advance of Linseed Oil Component Oxidation and Lipolysis during In Vitro Gastrointestinal Digestion
![PSA] Vitamin C serum - new vs oxidized. For anyone in doubt, here's what they look like! : r/SkincareAddiction PSA] Vitamin C serum - new vs oxidized. For anyone in doubt, here's what they look like! : r/SkincareAddiction](https://external-preview.redd.it/-G2I7m4LWioyEYHJsn9RdjIJjFcZUgKqni5s_cmkGLY.jpg?auto=webp&s=3068428e63b93e755e8a967f094ac688e69d5f5d)