Glaucoma is a progressive eye disorder that results from a buildup of fluid in the eye, which in turn increases pressure in the eye and damages the optic nerve. If left untreated it may cause vision loss and may eventually result in blindness. Treatment may include surgery to drain excess fluid from the eye, or oral drugs or eye drops to help reduce pressure in the eye. Vitamin C helps to support eye health and may play a role in the prevention or treatment of glaucoma, although evidence to prove this is limited. Talk to your doctor before taking supplemental vitamin C.
Properties and Uses
Vitamin C, also known as ascorbic acid, is a water-soluble vitamin with antioxidant effects. It helps to neutralize the effects of compounds that cause cell death, known as free radicals, and also plays an important role in wound healing and immune function. The Office of Dietary Supplements notes that it might help prevent or treat numerous conditions, including cancer and the common cold. It might also help reduce the risk of developing certain eye conditions, including cataracts and age-related macular degeneration.
Glaucoma Research
Research findings published in the February 2010 issue of "Graefe's Archive for Clinical and Experimental Ophthalmology" show that patients with a form of glaucoma known as normal-tension glaucoma have lower blood serum levels of vitamin C than healthy patients. The authors conclude, therefore, that vitamin C may be a possible alternative treatment for glaucoma. However, as of 2011, studies looking at the effect of vitamin C supplementation on glaucoma are lacking. Nevertheless, an article published in the July 2004 issue of "Ophthalmic & Physiological Optics" advocates the use of vitamin C supplements for eye health.
Sources and Administration
Vitamin C is found in varying amounts in a variety of foods, including red peppers, oranges, broccoli, cabbage, kiwifruit, strawberries and Brussels sprouts. It is also available as a dietary supplement in capsules and tablets. Since vitamin C is not a proven treatment for glaucoma, guidance regarding a suitable dosage is limited. However, the University of Maryland Medical Center notes that taking 1,000 mg daily will help to address any nutritional deficiencies.
Safety Considerations
Since vitamin C is water-soluble, the body is able to expel any that it does not need and, therefore, it is unlikely to have any toxic effects. However, the Office of Dietary Supplements warns that taking vitamin C supplements may cause side effects including stomach discomfort, diarrhea and nausea. Don't take supplemental vitamin C if you are undergoing treatment for cancer, as it may make your treatment less effective. Get medical clearance before taking vitamin C supplements for glaucoma.
References
- University of Maryland Medical Center; Glaucoma; June 2010
- Office of Dietary Supplements: Vitamin C
- "Graefe's Archive for Clinical and Experimental Ophthalmology"; Reduced-Serum Vitamin C and Increased Uric Acid Levels in Normal-Tension Glaucoma; K. Yuki, et al.; Febriary 2010
- Ophthmalmic & Physiological Optics"; An Ideal Ocular Nutritional Supplement?; H. Bartlett and F. Eperjesi; July 2004
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