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Sun Oct 12, 2014 7:01 am  |
| I really wanted to keep it simple but im only doing 10% but its still coming out with a ph of about 1.5. What can i do? |
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Sun Oct 12, 2014 8:34 am |
| Also i tried a bit on my hands and on the palms of my hands especially even though i washed them it smells like metallic and a fake tan smell but the liquid itself doesnt. Is that normal? |
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Fri Oct 17, 2014 7:31 am |
Tried again this time by mixing a little propylene glycol into my recipe and a large pinch of baking soda to up the PH, and yet again i can smell a fake tan smell on my hands half hour into applying it but i can only smell it on the palms of my hands and not really anywhere else i applied it. What am i doing wrong?
I dissolve the vit c in an open top glass with the water and stir it alot. Could it be this? Maybe i need to shake it in a closed top bottle so little air can get to it maybe? Not sure if this is normal, it smelt metallic at first which i hear is normal but now its just smelling like fake tan. Please someone help. |
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Fri Oct 17, 2014 5:04 pm |
| What type of vitamin C is it? MAP can often have a funny smell. |
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Sat Oct 18, 2014 5:41 am |
| Its l'ascorbic acid i have been using, i didnt even know what MAP was until now but its not that. |
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Sat Oct 18, 2014 4:34 pm |
That metallic smell is caused by oxidation of ascorbic acid, which is unstable and starts to degrade immediately after contact with water and skin, and eventually it turns skin orange too because of same oxidation issue. Save a sample a couple months till it turns brick red, then it reeks really bad!
I'm afraid there's only one way of avoiding the smell or the color side effects, it's just the price you pay for using ascorbic acid, however you can slow the process down by adding more antioxidants to the formula (like glutathione, lipic acid, tocopherol and ferulic acid) or decreasing the amount of water in your formula by replacing it with glycols or alcohols, either partially or fully. Most ready-made serums use both methods to increase shelf-life and ensure potential skin benefits.
The only proven way of keeping ascorbic acid stable and therefore scent- and color- less (until it's applied on skin) is suspending ascorbic acid in silicones, which is tricky to do at home, and not everyone likes silicones because they call for a good cleanser or they build up on skin. And a good cleanser is harder to find than a stable ascorbic acid serum...  |
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Do what all good pragmatists do. Compromise. |
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Sat Oct 18, 2014 7:37 pm |
| But if the vit c oxidizes on the skin surely thats bad for the skin? Wont that cause free radicals :O |
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Fri Oct 24, 2014 6:28 pm |
| khaleesi wrote: |
| But if the vit c oxidizes on the skin surely thats bad for the skin? Wont that cause free radicals :O |
In theory, yes. That's why it's important to get as much ascorbic acid into skin as possible, where it can actually be used and skin is able recycle oxidized ascorbic acid. You can google that under glutathione-ascorbic acid system. That's why there are solvents, penetration enhancers and tech stuff like encapsulation and other delivery systems in comercial serums. You can google that as well, Dr Sheldon Pinnell's work is a great starting point. |
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Do what all good pragmatists do. Compromise. |
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Mon Dec 08, 2014 11:36 am |
| jazzi wrote: |
| That metallic smell is caused by oxidation of ascorbic acid, which is unstable and starts to degrade immediately after contact with water and skin.... |
jazzi- I have recently started using C serums again and noticed that they all smell metallic but only if I use them after showering even if I wait 10-15 minutes for my skin to dry some. I am guessing that this is due to extra moisture in my skin after showering? If this is the case, then when is the best time to apply C serum? If I apply it after showering more of the ascorbic acid oxidizes but then the C might penetrate my skin better than if I apply it to dry skin. Or is it better to apply to completely dry skin and have less oxidation but less penetration into the skin. Then again maybe less penetration of oxidized C is a good thing or maybe not? I welcome your thoughts on this!
PS- I have had this happen with SkinCeuticals CE Ferulic, Phyto CE and Cosmetic Skin Solutions CE Ferulic. The Skinceuticals and Phyto were yellow but the CSS is crystal clear with no color. |
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