The Claim
In normal human fibroblasts exposed to hydrogen peroxide, physiologically relevant concentrations of vitamin C increase the intracellular labile iron pool and enhance iron-dependent DNA strand breakage and cell death.
What the research says
Roughly balanced
Support and challenge are close. The picture may shift as more studies come in.
These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.
In human skin cells under oxidative stress from hydrogen peroxide, vitamin C at normal physiological levels increases free iron inside the cells, leading to more DNA damage and cell death.
See the scientific wording
In normal human fibroblasts exposed to hydrogen peroxide, physiologically relevant concentrations of vitamin C increase the intracellular labile iron pool and enhance iron-dependent DNA strand breakage and cell death, suggesting a pro-oxidant role under conditions of oxidative stress.
When vitamin C enters a cell under oxidative stress, it converts stored iron into a more reactive form that reacts with hydrogen peroxide to create highly destructive molecules. These molecules break DNA strands, and when too many breaks happen at once, the cell dies.
What the research says
1 studyStudy: Vitamin C modulation of H2O2-induced damage and iron homeostasis in human cells.
In skin cells under stress from hydrogen peroxide, vitamin C acts like a double-edged sword: it helps free up iron inside the cell, which then makes the hydrogen peroxide cause more DNA damage and kill more cells. So instead of just protecting the cells, vitamin C can make things worse under these specific conditions.
Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.