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Vitamin C
Quest Diagnostics1 test optionFrom $70.37
Vitamin C
Quest DiagnosticsCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
Vitamin C Test
This test checks for Vitamin C levels in your body. Vitamin C is crucial for your body's connective tissues, helps in metabolizing drugs, and supports various enzyme functions. Not having enough Vitamin C can lead to scurvy, a condition that affects your body's ability to form mature connective tissue, leading to symptoms like skin bleeding, weakness, fatigue, and depression.
What patients is this test right for?This test is essential for individuals showing signs of Vitamin C deficiency or at risk of scurvy.
Symptoms to watch for include:• Easy bruising or bleeding
• Weakness
• Fatigue
• Depression
• Swollen gums
What type of sample is required for this test?1 mL frozen serum
Protect from light.
Proper handling is crucial.
Test Resources:For more information on how to prepare for the test or understand your results, please consult your healthcare provider.
Additional test information
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.
Collection and processing
- Sample type: Serum
- Fasting: No
- Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Related Sunridge care
Learn how Sunridge approaches Complex Multi-System Illness and ask whether this test is appropriate for your clinical question.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Serum. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: No. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should be available in 2 – 5 business days after the sample is collected. Timing can change after collection or if a laboratory requires additional review.
About this test
Vitamin C Test
This test checks for Vitamin C levels in your body. Vitamin C is crucial for your body's connective tissues, helps in metabolizing drugs, and supports various enzyme functions. Not having enough Vitamin C can lead to scurvy, a condition that affects your body's ability to form mature connective tissue, leading to symptoms like skin bleeding, weakness, fatigue, and depression.
What patients is this test right for?This test is essential for individuals showing signs of Vitamin C deficiency or at risk of scurvy.
Symptoms to watch for include:• Easy bruising or bleeding
• Weakness
• Fatigue
• Depression
• Swollen gums
What type of sample is required for this test?1 mL frozen serum
Protect from light.
Proper handling is crucial.
Test Resources:For more information on how to prepare for the test or understand your results, please consult your healthcare provider.
Additional details
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.
Highlighted health areas
- Immune System
- Nutrition
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Vitamin C (Ascorbic Acid)