hand, vitamin C does possess specific, scientifically validated merits for wrinkle reduction and skin rejuvenation. On the other hand, a lot of vitamin C products do not work. Potentially, vitamin C can benefit skin in two significant ways. Firstly, vitamin C is necessary for the synthesis of collagen, a key structural protein of the skin. Adding vitamin C to skin cells increases the synthesis of collagen. Secondly, vitamin C is an antioxidant and can help in reducing skin damage caused by free radicals. So, when vitamin C is properly delivered into skin cells, there is good possibility to reduce wrinkles and improve skin texture.
What research tells?
There are, however, some complicating circumstances. First, vitamin C is relatively unstable. In presence of air or other oxidizing agents, vitamin C is easily converted to oxidized forms. The oxidized vitamin C is not only incapable of boosting collagen synthesis or scavenging free radicals but may actually promote free radical formation causing damage to very important molecules such as proteins and DNA. In poorly stored skin care products, vitamin C may already be oxidized by the time you apply it to your skin. Second, only highly concentrated preparations deliver enough vitamin C to the cells to be topically effective. Skin care companies offer highly concentrated stabilized vitamin C products, which are supposed to be consistently effective. However, these are usually quite expensive. Even stabilized vitamin C products may be somewhat oxidized by the time you use them. When vitamin C oxidizes, it eventually acquires a yellowish tint demonstrating an advanced stage of oxidation. Some producers add coloring to their vitamin C products, in which case it becomes tough to spot advanced vitamin C oxidation. It is recommended in avoiding vitamin C products that aren't colorless or white. The lack of a tint does not, by itself, guarantee the lack of oxidation because the initial product of vitamin C oxidation is colorless.
Conclusion:
Therefore, when choosing a vitamin C product it is important to pick a trustworthy source and be careful about the expiration date and proper storage. If you are willing to invest extra time, you can easily make a vitamin C gel or serum on your own. That way you ensure both freshness and potency and can reduce cost. Keep in mind that large amounts of vitamin C orally is of little benefit for reducing wrinkles because you cannot obtain enough concentration of vitamin C in the skin to increase collagen production.

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