A healthy result should fall into the range 0.2 - 2.3 mg/dL.

Vitamin C is one of the water-soluble vitamins needed for health and survival. Its main functions include immunity, the synthesis of collagen and neurotransmitters, and protein metabolism. Vitamin C is one of the antioxidants used by the body to slow down aging and quench free radicals that may be involved in infections. The vitamin stimulates the synthesis of white blood cells, including phagocytes that engulf foreign bacteria. 

The body tissues that concentrate vitamin C are the white blood cells, eyes, and the adrenal glands. Studies show that vitamin C is very beneficial for cancer prevention and treatment, the healing of wounds, preventing eye disorders such as macular degeneration, healing from heart disease, and preventing the common cold.

Normal Ranges for Vitamin C in mg/dL or umol/L:

Adults: 0.6-2 mg/dL or > or equal to 50 umol/L (plasma)

Critical Range: <0.3 mg/dL or <11 umol/L (plasma)

Sources:

  1. https://emedicine.medscape.com/article/2088649-overview
  2. http://lpi.oregonstate.edu/mic/vitamins/vitamin-C 
  3. http://www.lifeextension.com/Vitamins-Supplements/itemLC001479/Vitamin-C-Blood-Test#description 

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