Vitamin C


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Quest Diagnostics Test Code: 929

Vitamin C is an antioxidant involved in connective tissue metabolism, drug-metabolizing systems, and mixed-function oxidase systems to list a few. Vitamin C deficiency causes scurvy; manifestations include impaired formation of mature connective tissue, bleeding into the skin, weakness, fatigue, and depression.

Vitamin C, also known as ascorbic acid, is one of the water soluble vitamins. It is a principle component in the production of collagen, which is needed for healthy hair, bones, blood vessels, teeth and cartilage. Vitamin C is also needed for building a strong immune system and is a powerful antioxidant. Vitamins C deficiency leads to scurvy, a condition which causes pain in the joints and muscles and easy bleeding. This test measures the amount of vitamin C in the body to help diagnose deficiencies and determine if vitamin C supplements are required.

This test is performed in following conditions such as:

• Tiredness and weakness
• Muscle and joint pains
• Easy bruising
• Dry skin and hair
• Swelling, bleeding and discoloration of your gums
• Nose Bleeds
• Problems fighting infections
• Joint pains

Also Known As: Ascorbic Acid


Overnight fasting is preferred. Refrain from taking vitamin C supplements or fruits 24 hours prior to sample collection.


Specimen Collected
  • Blood
Estimated Time Taken

Turnaround time for the Vitamin C testing results is typically 2-3 business days.