From
Wouldn't you love to use a product
that helps protect the skin from the sun, neutralizes free radicals,
and increases collagen synthesis? Once it is in the skin, studies
show that L-ascorbic Acid (a form of Vitamin C) stimulates collagen
synthesis, provides sun protection, stays in the skin for up
to 72 hours, and protects skin by neutralizing free radicals,
which would otherwise destroy skin and its components.
Vitamin C in a product's ingredient list doesn't
necessarily mean it is effective. Vitamin C products may be
at least somewhat oxidized by the time you use them. When Vitamin
C oxidizes, it eventually acquires a yellowish tint indicating
an advanced stage of oxidation. Unfortunately, the lack of a
tint does not guarantee that the products hasn't oxidized because
the the initial product of Vitamin C oxidation (Dehydroascorbic
Acid) is colorless. Only a furthering of the oxidation process
produces a noticeable yellowish tint. The ultimate consideration
when choosing a Vitamin C product is finding a trustworthy brand
and being careful to check the expiration date and packaging.
Cellex-C Seline-E Enhancer 
A smooth, rich moisturizer created to enhance the potency of Vitamin
C and provide antioxidant moisture protection for the skin, day
or night.
Cellex-C High Potency Serum
With regular use, the High Potency Serum will visibly improve
the color and texture of the skin.
La Roche-Posay Biomedic Potent-C 10.5 Concentrate 
Will combat wrinkles in any skin type, and can complement the
results of professional procedures.
Physicians Complex C-Plus Antioxidant Cream 
This unique formula combines 20% Vitamin C, 5% Vitamin E and 2%
Vitamin A with Lipids. 3.0 pH
