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Mon Aug 06, 2018 6:42 pm  |
| If I wanted to make a simple 15% diy vitamin c serum, but wanted to add germal plus as a preservative, how much would anyone recommend? I am making 1oz of it..thank you, just can't find a recipe. |
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39, fair skinned redhead, .1%micro retin A, lighstim, dermaroller 1.0, Patakara, vitamin c homemade, occasional skin bio peptides and lactic cream |
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Fri Jan 18, 2019 7:09 pm |
OK! L-acidic acid that you make at home with the correct pH (around 3.2) will not need preservatives since it's in such acidic environment.
My concern is STABILITY of Vit C and no preservatives will help that.
So make small patches and throw out every 3 days (max 5 days).
It can be made substantially more stable if your formula contains a large percentage of ethanol. Ferulic Acid will also help stabilize it (eg look at the Skinceutical forumlation). |
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| Thu Apr 18, 2024 9:48 pm |
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