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Vitamin C: poison, prophylactic or panacea?
1Dept of Biochemistry, National University of Singapore, Kent Ridge Crescent, Singapore 119260. bchbh@nus.edu.sg
Trends in Biochemical Sciences
|July 3, 1999
Summary
Vitamin C (ascorbate) acts as an antioxidant, but recent studies show it may increase DNA damage in humans. Further research is needed to understand ascorbate
Area of Science:
- Biochemistry
- Molecular Biology
- Human Physiology
Background:
- Ascorbate (Vitamin C) is a vital enzyme cofactor.
- It is widely recognized for its antioxidant properties in vivo.
- Ascorbate protects against cancer by neutralizing reactive oxygen species.
Purpose of the Study:
- To investigate the dual role of ascorbate in biological systems.
- To examine recent findings suggesting ascorbate may increase DNA damage.
- To re-evaluate the mechanisms of ascorbate's antioxidant action.
Main Methods:
- Review of recent scientific literature.
- Analysis of studies investigating ascorbate and DNA damage.
- Comparative analysis of ascorbate's pro-oxidant and antioxidant effects.
Main Results:
- Ascorbate functions as an essential enzyme cofactor.
- Emerging evidence indicates ascorbate can paradoxically increase DNA damage in humans.
- Current data does not indicate deleterious effects from this DNA damage.
Conclusions:
- The established understanding of ascorbate's antioxidant mechanisms requires re-evaluation.
- Further investigation into the complex role of ascorbate in vivo is warranted.
- Ascorbate's potential pro-oxidant effects warrant consideration in human health contexts.