Vitamins-etc.com
This is a comprehensive online vitamin store, which carries all kinds of vitamins and multivitamins for men, women and children. Full information is provided for each product, and they ship USA, Canada and internationally.
From the site's health encyclopedia: "Vitamin C (Ascorbic acid) is water soluble and is easily lost from your body. The RDA for adults is 60 milligrams. It is important for the growth and repair of your body tissue cells, bones, gums and teeth. It fights bacterial infections, protects Vitamin A, some of the B vitamins and vitamin E from oxidation and is necessary for the use of iron and oxygen in the body. People who lack vitamin c may have sore gums and bleeding under the skin. It helps in reducing blood cholesterol levels, aids in preventing bacterial and viral infections, and prevents and cures scurvy."

Vitamin C - more top resources

Vitamin C - Discussion of function, deficiency, disease prevention, disease treatment, food sources, new research, and recommendations from the Linus Pauling Institute.

Vitamin C Supplementation - Offers a clinical perspective on how supplementing varying amounts of Vitamin C affects nutritional balance and medical conditions.

Body, Spirit, Spa, Ltd. - Spa-quality products from France, Austria, Asia and the U.S. Cellulite, eye creams, sunscreens. Vitamin C & Fruit Acid remedies, along with skin and body care advise.

rejuvaMED - This site offers topical Vitamin C for skin care. Order through phone, mail or order form.

Nutrient Data Laboratory Food Composition Data - How much vitamin C is in an orange? How much potassium is there in stir-fried mung beans? This site has the answers to these questions. Includes non-vegan foods.

The Antioxidant Vitamin: Vitamin C - Article by Gary Null, Ph.D. on the biochemistry involved with vitamin C.

SkinCareRx - Offers products containing vitamin C and other ingredients. Dictionary of skincare ingredients.

OrangeDaily - This vitamin C skin care antioxidant provides protection against free radicals, stimulates collagen, protects against sun.

Anyvitamins.com- Vitamin C - Also known as ascorbic acid, discusses functions in body, food sources, recommended useage, overdosage, and suggested uses for the water soluble vitamin.

CenterForSkin.com - Obagi products, including Vitamin C and NuDerm.

Canarino - An Italian hot lemon beverage. High in vitamin C, and contains no calories.

Performing Science - This online store sells high-potency, dissolving, effervescent vitamin C tablets.

Skin Care Nutritional, Inc. - Skin care beauty products for total skin health. Including, pregnancy skin care, dermatologist formulated products, aloe vera, botanicals, vitamin E, acne treatments, Vitamin C skin products, and anti aging skin treatments.

AcneGo - Offers a cream based on tea tree and vitamin C in an aquaeous-base to get free of acne in four weeks.

Stressed Out- Take Vitamin C - Discusses studies suggesting that vitamin C helps boost the body's natural defenses and fights stress.

VesPro Life Sciences - Offers a topical Vitamin C compound with ingredients to neutralize free radical activity caused by exposure to the sun, stress, pollution, and smoking.

C For Yourself - Dedicated to optimum nutrition and disease prevention and treatment by supplementation with Vitamin C.

Cellex-C Line - Complex of L-ascorbic acid vitamin C, tyrosine and zincs to treat and prevent lines, wrinkles and age spots.

Complex-C - Offers a vitamin C based product in the form of ascorbic acid that works as an antioxidant for skin repair and wrinkles.

Tretin-Care Products - Distributor of Environ skin care products which are designed to improve the health of your skin using natural Vitamin C, Vitamin A and antioxidants.

Vitamin C Deficiency - A discussion about this vitamin and why we need it. Symptoms, laboratory finding, diagnoses, prophylaxis and treatment are covered.

Quacks, Vitamin Pushers, and smoking - Quackwatch evaluation of vitamin regimens for smokers. "Many vitamin pushers suggest that smokers need vitamin C supplements. Although smokers have somewhat lower blood levels of this vitamin, these levels are still far above deficiency levels. In America, cigarette smoking is the leading cause of death preventable by self-discipline. Rather than seeking false comfort by taking vitamin C, smokers who are concerned about their health should stop smoking."

SkinCeuticals - Offering a variety skin care products and treatments including topical vitamin C gels.

Tower Laboratories - This seller offers vitamin C and lysine in a drinkable form.

EC Mode - Beauty salon products formulated with Vitamin E and Vitamin C for the hair, skin, scalp and inside and outside the body.

Natural Food: Fruit Vitamin C Content - The vitamin C content of over 50 commercial and wild fruits is listed, both by serving and by 100 mg sample.

Vitamin C and Scurvy - An article on vitamin C and how this disease occurs including symptoms.