The Claim
In acidic conditions (pH 3.5–5), ascorbic acid induces hydrogen peroxide formation in the presence of copper ions in drinking water, and trace amounts of iron (0.2 mg/L) completely block this formation, indicating a chemical interaction among iron, copper, and ascorbic acid that suppresses hydrogen peroxide accumulation.
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.
When ascorbic acid is in acidic drinking water with copper ions, hydrogen peroxide forms; adding a small amount of iron stops this hydrogen peroxide from forming.
See the scientific wording
In acidic conditions (pH 3.5–5), ascorbic acid induces hydrogen peroxide formation in the presence of copper ions in drinking water, but this formation is completely blocked by trace amounts of iron (0.2 mg/L), suggesting a chemical interaction between iron, copper, and ascorbic acid that suppresses hydrogen peroxide accumulation.
When vitamin C and copper are together in acidic water, copper uses vitamin C to create hydrogen peroxide. But when a tiny amount of iron is present, it grabs the breakdown product of vitamin C called oxalic acid and uses it to destroy hydrogen peroxide before it can build up.
What the research says
1 studyWhen vitamin C and copper are in acidic water, they make hydrogen peroxide — but adding a tiny bit of iron stops it completely. The study proved this happens exactly as described.
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.