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Which Vitamin C is Good For Your Skin?


Vitamin C is widely used
in cosmetics now. 
 It can get confusing which ones really work, which ones are useless. You get bombarded with many marketing hypes, each kind of vitamin C
sounding different, formulated in varying amounts.

Vitamin C is of course L-
ascorbic acid, and that is the form that works. The problem with L- ascorbic
acid is that it is unstable for topical application. When exposed to heat, air,
or light, it breaks down quickly, becomes ineffective and even potentially
harmful to skin.

Scientists have developed
stable vitamin C derivatives with comparable or superior skin benefits. A vitamin
C derivative should be able to easily penetrate into skin cells and release
L-ascorbic acid in amounts sufficient to boost collagen synthesis. Ideally, it
should be less irritating than vitamin C. Three compounds have found their way
into the broad skin care market: ascorbyl palmitate, magnesium ascorbyl
phosphate, and ethyl ascorbic acid.

HYAL-C has ethyl ascorbic acid.
Ascorbyl palmitate is the
most widely used oil-soluble vitamin C derivative in skin care. It is
nonirritating and more stable than vitamin C. Unfortunately, the concentrations
of ascorbyl palmitate achievable in skin care formulas do not boost collagen
synthesis.



Magnesium ascorbyl phosphate is a
water-soluble derivative of vitamin C. It is nonirritating and has a conversion
percentage to L-ascorbic acid of over 60%, enough to boost skin collagen synthesis.
Overall, magnesium ascorbyl phosphate appears to be a good choice for people
with sensitive skin.



Ethyl ascorbic acid is
what maybe considered a next generation Vitamin C derivative. It is a highly
stable, non-irritating, patented derivative. Ethyl ascorbic acid is the most effective
among the three in boosting collagen synthesis and lightening skin, with over
80% metabolized to pure L-ascorbic acid.


Bottomline. When
choosing your vitamin C serum, choose the one with ethyl ascorbic acid. Look
for colorless or white formulation in an airless bottle. Freshness and proper
storage are important. The container should allow you to spot advanced stages
of oxidation of the active ingredient by the emergence of a yellowish to
brownish tint. There will still be degradation when exposed to light and air,
and you don’t want to end up with a useless product.

____________________________________________________________________________This column was published in the May 8, 2012 issue of the Manila Bulletin Lifestyle Section. The author is the CEO of SkinStation.
He received the 2011 Outstanding Chemist Award from Professional Regulations
Commission for his achievements in the field of cosmetic chemistry. He can be
reached at
fred.reyes@skinstation.ph.
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