Banana Naturally ripened bananas have malic acid as the main organic acid, with citric and oxalic acids present ... as well as other organic acids like ascorbic, glycolic, and citric acids.

The oxalic acid in spinach makes it harder for ... meal may inhibit the absorption of the iron your meal contains. Ascorbic acid (vitamin C) can increase the absorption of iron when they are ...

Ascorbic acid loses its antiscorbutic action when the ... which afterwards breaks down to threonic and oxalic acids from which the vitamin cannot be recovered by simple reduction.