Vitamin C is often regarded as a wrinkle fighter and an anti-aging agent. The main objective in using vitamin C, in scientific terms, is to increase the synthesis of collagen, a structural protein that is found in skin. An additional benefit in using vitamin C is for its’ capability of countering free radicals which cause damage to the skin. Vitamin C is an anti-oxidant and protects the skin from these free radicals.

Vitamin C however, faces a major challenge. This is related to the oxidation tendency of many vitamin C skin care products. When vitamin C comes into contact with any oxidizing agent, like air, the vitamin C gets oxidized, thus making the product useless. The oxidized vitamin C will impart a yellowish-brown color.

The manufacturers of vitamin C skin care products have tried to deal with this oxidation problem in multiple ways and research on vitamin C skin care products is on the top of their list. One such method of retaining effectiveness of vitamin C for a long term is to keep a high concentration of 10% and storing it in a dark colored container. Some manufactures use a derivative of vitamin c, like ascorbyl palmitate and magnesium ascorbyl phosphate. These are not only more stable but also inexpensive. Even though the derivative-based products are not as effective as vitamin C skin care products, their stability against oxidation is a very desirable feature that makes them very attractive. Moreover, these are known to be less irritating as well.

Many manufactures agree that the best way to buy a vitamin c product now is to buy it in a serum form. Serums contain a more potent dose of vitamin C and are usually contained in a dark colored bottle or encapsulated with a special delivery system. This protects the vitamin c from oxidating too quickly.

BENEFIT Firmology Toning serum Cream Rtl$35 Great item! US $7.95 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:05:33 PST   | Watch this Item

BeautiControl PLATINUM REGENERATION SKIN RENEWING SERUM white thinner formula US $32.99 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:11:48 PST   | Watch this Item

Korres day+night+eye cream+serum quercetin oak US $30.00 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:11:52 PST   | Watch this Item

2 OLAY Regenerist Eye Lifting Serum Anti-Aging Cream Lotion Daily Treatment NIB US $30.00 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:12:04 PST   | Watch this Item

CosMedix Clarity Serum: oily, blemish-prone skin 30 ml US $24.50 Auction Ends: Wednesday Feb-08-2012 15:12:07 PST   | Watch this Item

Anew Reversalist Renewal Serum US $6.01 (6 Bids) Auction Ends: Wednesday Feb-08-2012 15:12:21 PST   | Watch this Item

Frizz Ease Weather Works Shampoo Phyto Anti Serum Uoidad Climate Control Gel +++ US $13.99 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:13:18 PST   | Watch this Item

PLATONE New Zealand Moisturizing Creme Eye Serum Eye Cream Day Night Cream Aloe US $42.00 Auction Ends: Wednesday Feb-08-2012 15:15:09 PST   | Watch this Item

Cle De Peau Beaute Anti-Age Spot Serum U 6 ml. Trial Size US $12.95 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:15:18 PST   | Watch this Item

SkinCeuticals Serum 20 AOX+ - Six Travel Samples - FREE SHIPPING US $32.75 Auction Ends: Wednesday Feb-08-2012 15:16:08 PST   | Watch this Item

NIB SEALED OLAY REGENERIST LIFTING SERUM - EYE DAILY TREATMENT .5 OZ. US $14.51 (6 Bids) Auction Ends: Wednesday Feb-08-2012 15:16:37 PST   | Watch this Item

Wei East White Lotus Defining Moment Serum US $4.25 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:17:16 PST   | Watch this Item

NIB SEALED OLAY REGENERIST LIFTING SERUM - EYE DAILY TREATMENT .5 OZ. US $12.49 (3 Bids) Auction Ends: Wednesday Feb-08-2012 15:17:22 PST   | Watch this Item

Exuviance OptiLight Essential 6 Pigment Serum US $45.00 Auction Ends: Wednesday Feb-08-2012 15:20:50 PST   | Watch this Item

Exclusive Syn®-Ake Synake Matrixyl Venuceane Capsaicin Peptide Wrinkle Eye Serum US $13.99 (1 Bid) Auction Ends: Wednesday Feb-08-2012 15:21:43 PST   | Watch this Item

LUMENE VITAMIN C+ ANTI PUFFINESS ROLL-ON EYE SERUM NEW! US $14.29 Auction Ends: Wednesday Feb-08-2012 15:25:20 PST   | Watch this Item

Lot 52 Glotherapeutics Cleanser Cream Serum Blemish Conditioning Eye Gel Resell US $305.00 (7 Bids) Auction Ends: Wednesday Feb-08-2012 15:27:03 PST   | Watch this Item

ReVive Intensive Volumizing Serum US $5.00 (1 Bid) Auction Ends: Wednesday Feb-08-2012 15:27:34 PST   | Watch this Item

NIB MD Formulations Continuous Renewal Serum US $46.00 Auction Ends: Wednesday Feb-08-2012 15:29:05 PST   | Watch this Item

2 oz 25% MATRIXLY 3000 W 10%ARGIRELINE MATRIXYL HYALURONIC ACID SERUM ANTI AGING US $28.00 (1 Bid) Auction Ends: Wednesday Feb-08-2012 15:30:20 PST   | Watch this Item

AVEDA GREEN SCIENCE Lifting Serum 1oz/30ml NEW US $45.00 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:33:08 PST   | Watch this Item

CosMedix Cell ID: Intensive Defense Serum for Prematurely Aged Skin 15ml US $72.00 Auction Ends: Wednesday Feb-08-2012 15:34:18 PST   | Watch this Item

MARINE PEPTIDE COLLAGEN SERUM STRONG 20% MATRIXYL 3000 US $46.50 Auction Ends: Wednesday Feb-08-2012 15:36:40 PST   | Watch this Item

Paul Mitchell Smoothing Super Skinny Serum 8.5 oz US $29.65 Auction Ends: Wednesday Feb-08-2012 15:36:59 PST   | Watch this Item

BLISS THE YOUTH AS WE KNOW IT ANTI-AGING SERUM 1 FL OZ. NIB US $42.29 Auction Ends: Wednesday Feb-08-2012 15:40:18 PST   | Watch this Item

NIB Arbonne NutriMin C Re9 Facial Serum Day & Night US $59.95 Auction Ends: Wednesday Feb-08-2012 15:42:55 PST   | Watch this Item

DR BRANDT LIGHTENING SERUM FLAWS NO MORE FULL SIZE BRAND NEW IN BOX FRESH 1 OZ US $59.99 Auction Ends: Wednesday Feb-08-2012 15:45:41 PST   | Watch this Item

Clinique All About Eyes Serum De-Puffing Eye Massage Sample US $9.99 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:45:42 PST   | Watch this Item

YVES ROCHER SERUM VEGETAL LIFT EFFECT CREAM FOR FACE NECK US $29.99 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:45:42 PST   | Watch this Item

4 Serum Raker Mirrodin Besieged MTG Playset x4 US $1.00 Auction Ends: Wednesday Feb-08-2012 15:47:29 PST   | Watch this Item

IS Clinical White Lightening Serum US $62.99 Auction Ends: Wednesday Feb-08-2012 15:47:47 PST   | Watch this Item

Serious Skin Care Super Eye Creamerum .5 oz Innovative Cream/Serum Formula US $8.77 Auction Ends: Wednesday Feb-08-2012 15:50:51 PST   | Watch this Item

Serious Skin Care Super Creamerum .5 oz New Sealed-Cream Serum Blend for Skin US $5.77 Auction Ends: Wednesday Feb-08-2012 15:50:51 PST   | Watch this Item

Murad Resurgence Age-Diffusing Serum 1.0 oz "BRAND NEW" US $49.00 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:52:15 PST   | Watch this Item

BRAND NEW PRODUCT! Meaningful Beauty Creme Cream de Serum Full Size SEALED US $49.95 Auction Ends: Wednesday Feb-08-2012 15:53:13 PST   | Watch this Item

HydroPeptide HydroStem +6 Anti-Wrinkle Stem-Cell Regeneration Serum 1 oz. US $140.00 Auction Ends: Wednesday Feb-08-2012 15:54:47 PST   | Watch this Item

L'Oreal Skin Genesis Daily Moisturizer SPF 15 Lotion With Bonus Serum US $7.99 (0 Bid) Auction Ends: Wednesday Feb-08-2012 15:55:35 PST   | Watch this Item

LOREAL VISIBLE LIFT SERUM ABSOLUTE MAKEUP CLASSIC IVORY #145 US $12.00 Auction Ends: Wednesday Feb-08-2012 15:58:15 PST   | Watch this Item

4 Serum Raker - Foil Mirrodin Besieged MTG Playset x4 US $1.00 Auction Ends: Wednesday Feb-08-2012 15:58:22 PST   | Watch this Item

NEW Meaningful Beauty Glowing Serum Full Size .5 oz SEALED US $39.95 Auction Ends: Wednesday Feb-08-2012 16:00:45 PST   | Watch this Item

Murad Bodycare Firm and Tone Serum 16.9 fl oz NEW! w/ PUMP! Salon size US $82.99 Auction Ends: Wednesday Feb-08-2012 16:02:03 PST   | Watch this Item

Regeneration Tight Firm & Fill Eye Firming Serum US $30.00 (0 Bid) Auction Ends: Wednesday Feb-08-2012 16:06:17 PST   | Watch this Item

OLAY Total Effects 7 in 1 Anti-Aging BOOSTER Instant SMOOTHING SERUM * SEALED * US $19.50 (0 Bid) Auction Ends: Wednesday Feb-08-2012 16:07:29 PST   | Watch this Item

NEW Meaningful Beauty Eye Enhancing Serum .5 oz SEALED US $39.95 Auction Ends: Wednesday Feb-08-2012 16:10:44 PST   | Watch this Item

iS Clinical Active Serum 10 pack samples .125 oz 130.00 value US $58.77 (7 Bids) Auction Ends: Wednesday Feb-08-2012 16:11:47 PST   | Watch this Item

Clarins Advanced Extra-Firming Eye Contour Serum 20mL 0.7 oz. NEW US $39.99 (1 Bid) Auction Ends: Wednesday Feb-08-2012 16:13:29 PST   | Watch this Item

Stamp Germany Mi 760-1 Sc B186-7 WWII 3rd Reich Nazi Behring Serum Doctor Used US $4.45 Auction Ends: Wednesday Feb-08-2012 16:14:26 PST   | Watch this Item

CLINIQUE ALL ABOUT EYES SERUM DE-PUFFING EYE MASSAGE .17 OZ FREE SHIPPING! US $3.25 (5 Bids) Auction Ends: Wednesday Feb-08-2012 16:16:18 PST   | Watch this Item

MOTIONS SMOOTHING SHINE SERUM 2OZ US $11.89 Auction Ends: Wednesday Feb-08-2012 16:16:40 PST   | Watch this Item

iS Clinical Super Serum Advance+ 10 pack samples vials .125 oz 175.00 value US $49.99 (0 Bid) Auction Ends: Wednesday Feb-08-2012 16:17:57 PST   | Watch this Item