Quote:
Originally posted by NotFromHere
The MD vitamin C treatment is excellent, also. Also worth the $80.
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A fool indeed.
L-ascorbate is very unstable once it comes into contact with the air or UV light. The UV light can be shielded by the packaging, but the air is a problem from the minute you open it. It is an anti-oxidant, which means when it is suspended in an aqueous solution, as soon as it comes into contact with oxygen, it gets oxidized. That is how vitamin C protects your tissues - by scavenging the free radicals that would otherwise damage the tissues.
The vitamin C doesn't retain its potency for very long after you open a product. Moreover, the studies show that absorption of topically applied vitamin C only occurs at certain pH's. Most of the products that have vitamin C in them are buffered to too high a pH so you are not absorbing any of the vitamin C.
