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.

Murad Resurgence Age-Diffusing Serum *30ml/1.0oz US $59.99 Auction Ends: Friday Jul-30-2010 1:04:02 PDT   | Watch this Item

Cellex-C High Potency Serum - Brand New (Sealed Box) US $70.00 Auction Ends: Friday Jul-30-2010 1:04:11 PDT   | Watch this Item

AHA ALPHA HYDROXY SERUM ANTI AGING REDUCES FINE LINES US $15.99 Auction Ends: Friday Jul-30-2010 1:05:04 PDT   | Watch this Item

$40 VITAMIN K ROSACEA SPIDER VEINS FACE SERUM US $15.99 Auction Ends: Friday Jul-30-2010 1:05:23 PDT   | Watch this Item

$40 VITAMIN K ROSACEA SPIDER VEINS FACE SERUM US $15.99 Auction Ends: Friday Jul-30-2010 1:05:28 PDT   | Watch this Item

AHA ALPHA HYDROXY SERUM ANTI AGING REDUCES FINE LINES US $15.99 Auction Ends: Friday Jul-30-2010 1:05:32 PDT   | Watch this Item

$40 VITAMIN K ROSACEA SPIDER VEINS FACE SERUM US $15.99 Auction Ends: Friday Jul-30-2010 1:05:40 PDT   | Watch this Item

$40 VITAMIN K ROSACEA SPIDER VEINS FACE SERUM US $15.99 Auction Ends: Friday Jul-30-2010 1:05:41 PDT   | Watch this Item

$40 VITAMIN K ROSACEA SPIDER VEINS FACE SERUM US $15.99 Auction Ends: Friday Jul-30-2010 1:05:49 PDT   | Watch this Item

AHA ALPHA HYDROXY SERUM ANTI AGING REDUCES FINE LINES US $15.99 Auction Ends: Friday Jul-30-2010 1:05:51 PDT   | Watch this Item

$40 VITAMIN K ROSACEA SPIDER VEINS FACE SERUM US $15.99 Auction Ends: Friday Jul-30-2010 1:05:54 PDT   | Watch this Item

CELLEX-C Ageless 15 Skin Signaling Serum - 1 oz - New US $160.00 Auction Ends: Friday Jul-30-2010 1:06:51 PDT   | Watch this Item

3x BOOTS NO 7 PROTECT & PERFECT INTENSE BEAUTY SERUM TV US $72.15 Auction Ends: Friday Jul-30-2010 1:10:09 PDT   | Watch this Item

Cellex-C Advanced-C Serum - Brand New (Sealed Box) US $90.00 Auction Ends: Friday Jul-30-2010 1:10:48 PDT   | Watch this Item

PEVONIA PROPOLIS CONCENTRATE SERUM 1 oz (30 ml) US $53.95 Auction Ends: Friday Jul-30-2010 1:16:01 PDT   | Watch this Item

[Skin Food]Skinfood Black Raspberry Serum *NEW* 45mL US $18.99 Auction Ends: Friday Jul-30-2010 1:20:15 PDT   | Watch this Item

Decleor Aromessence Excellence Serum 15ml/0.5oz US $79.38 Auction Ends: Friday Jul-30-2010 1:23:18 PDT   | Watch this Item

Guinot Acni Logic Intelligent Sebum Control Serum 50ml US $52.32 Auction Ends: Friday Jul-30-2010 1:24:35 PDT   | Watch this Item

MD Formulation The Temps Brighten & Tighten Eye Serum US $35.63 Auction Ends: Friday Jul-30-2010 1:28:10 PDT   | Watch this Item

[Skin Food]Skinfood Gold Caviar Serum(wrinkle care)*NEW US $24.99 Auction Ends: Friday Jul-30-2010 1:28:49 PDT   | Watch this Item

PEVONIA PROPOLIS CONCENTRATE SERUM 1 oz (30 ml) US $53.95 Auction Ends: Friday Jul-30-2010 1:30:17 PDT   | Watch this Item

[Skin Food]Skinfood Peach Sake Pore Serum *NEW* 45ml US $13.99 Auction Ends: Friday Jul-30-2010 1:39:40 PDT   | Watch this Item

Trial sizes KERASTASE serum nuit + FEKKAI PROTEIN RX PM US $5.50 (1 Bid) Auction Ends: Friday Jul-30-2010 1:47:19 PDT   | Watch this Item

PEVONIA YOUTHFUL LIP SERUM 0.5 oz (15 ml) US $39.95 Auction Ends: Friday Jul-30-2010 1:50:01 PDT   | Watch this Item

[Skin Food]Skinfood Gold Caviar Lifting Eye Serum *NEW* US $24.99 Auction Ends: Friday Jul-30-2010 1:53:32 PDT   | Watch this Item

ORGANIC STRONGEST 25% VITAMIN C SERUM SKIN SUN DAMAGE US $16.99 (0 Bid) Auction Ends: Friday Jul-30-2010 1:53:40 PDT   | Watch this Item

PEVONIA TIMELESS CAVIAR REPAIR SERUM 1oz (30 ml) US $129.95 Auction Ends: Friday Jul-30-2010 1:54:01 PDT   | Watch this Item

PEVONIA TIMELESS CAVIAR EYE FLUID SERUM 1oz (30 ml) US $129.95 Auction Ends: Friday Jul-30-2010 1:55:01 PDT   | Watch this Item

Pur HYALURONIC ACID Serum Anti Aging Firm Skin Wrinkles US $7.95 (0 Bid) Auction Ends: Friday Jul-30-2010 2:10:16 PDT   | Watch this Item

Murad Firm and Tone Serum ( Salon Size ) 500ml/16.9oz US $103.73 Auction Ends: Friday Jul-30-2010 2:17:54 PDT   | Watch this Item

Dr. Brandt Lineless Anti-Glycation Serum 45ml/1.5oz US $78.02 Auction Ends: Friday Jul-30-2010 2:19:59 PDT   | Watch this Item

Murad Sensitive Skin Soothing Serum ( Salon Size ) 100 US $126.73 Auction Ends: Friday Jul-30-2010 2:25:16 PDT   | Watch this Item

Pureology Super Straight Relaxing Hair Serum 145g/5.1o US $25.71 Auction Ends: Friday Jul-30-2010 2:28:54 PDT   | Watch this Item

Elemis Pro-Collagen Quartz Lift Serum 30ml/1oz US $164.62 Auction Ends: Friday Jul-30-2010 2:30:41 PDT   | Watch this Item

Dr Jart V7 Renewal Serum 30ml US $64.95 Auction Ends: Friday Jul-30-2010 2:34:15 PDT   | Watch this Item

LANCOME Renergie Morpholift RARE Advanced Serum 5ml NEW US $0.89 (1 Bid) Auction Ends: Friday Jul-30-2010 2:45:15 PDT   | Watch this Item

♥ 3 X CREME DE LA MER SERUM REGENERATING 3ml x 3 = 9ml US $57.75 Auction Ends: Friday Jul-30-2010 2:46:44 PDT   | Watch this Item

Isomers Accelerated Recovery Serum SUPER SIZED 4.06 fl US $75.00 Auction Ends: Friday Jul-30-2010 2:47:54 PDT   | Watch this Item

MIRENESSE Superstar Eye Serum New Formula TRIAL 5g $40 US $13.98 Auction Ends: Friday Jul-30-2010 2:57:20 PDT   | Watch this Item

ORGANIC STRONGEST 25% VITAMIN C SERUM SKIN SUN DAMAGE US $16.99 (0 Bid) Auction Ends: Friday Jul-30-2010 3:00:16 PDT   | Watch this Item

CLARINS EXTRA-FIRMING CONCENTRATE SERUM 10ML BNIB US $9.01 Auction Ends: Friday Jul-30-2010 3:15:12 PDT   | Watch this Item

L'Oreal Visible Lift Serum Inside Line Minimizing Make US $11.28 Auction Ends: Friday Jul-30-2010 3:26:17 PDT   | Watch this Item

Phyto Phytocyane Revitalizing Serum ( Thinning Hair Wo US $48.26 Auction Ends: Friday Jul-30-2010 3:31:53 PDT   | Watch this Item

St.herb Conmax Men Serum - prolong and harder ERECTION! US $95.00 Auction Ends: Friday Jul-30-2010 3:39:17 PDT   | Watch this Item

ANTI AGING L HYALURONIC ACID MATRIXYL FIRMING SERUM US $16.99 (0 Bid) Auction Ends: Friday Jul-30-2010 3:39:37 PDT   | Watch this Item

KALLISTE Expert Nano Gold Caviar Lift & Firm Serum US $99.00 Auction Ends: Friday Jul-30-2010 4:05:33 PDT   | Watch this Item

4xSpa Anti-Wrinkle Mineral Serum Dead Sea Product 30ml US $64.00 Auction Ends: Friday Jul-30-2010 4:13:49 PDT   | Watch this Item

Strivectin-HS Hydro-Thermal Deep Wrinkle Serum US $25.99 (1 Bid) Auction Ends: Friday Jul-30-2010 4:16:51 PDT   | Watch this Item

It's A 10 Miracle Styling Serum 4 fl. oz. US $24.98 Auction Ends: Friday Jul-30-2010 4:21:36 PDT   | Watch this Item

Juice Beauty Soothing Serum 60ml/2oz US $34.28 Auction Ends: Friday Jul-30-2010 4:22:41 PDT   | Watch this Item