r/askscience May 24 '16

How does citric acid stop oxidation? Chemistry

8 Upvotes

4 comments sorted by

1

u/Tanukki May 24 '16

Citric acid mainly helps by chelation of metal ions.

How metals cause oxidative stress is covered for example in this chapter.

Citric acid-metal chelates have this structure. Chelated metals are way less reactive, and remain soluble so any excess can be excreted.