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Two clear effects of vitamin C on the skin:
1.
Needed to make collagen. You're fibroblasts need vitamin C to produce collagen in normal/increased amounts.
2.
Needed to protect your skin from free radical damage. Vitamin C is a great anti-oxidant.
So yes, vitamin C is great for skin cells. But don't start rubbing oranges on your face just yet, of course there's a catch!
The problem with vitamin C is two-fold.
1.
It's not very stable in skincare products.
2.
You need high concentrations of it to even have a chance to work by actually penetrating your skin.
Vitamin C and it's derivatives can become oxidized when exposed to air. Not only will this cause it to lose its efficacy, once it is oxidized it can do a backstabbing number on you. It may actually increase the amount of free radicals. Don't get too concerned with this, just make sure that you are using fresh products. Never use vitamin C containing products that are expired! And if a formula or cream changes color on you, this is NOT a good sign, throw it out ASAP, or, better yet, return it if you can.
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