Revise the following paragraph to improve clarity, brevity, and organization: As for many food components, the intake of metal ions can be a double edged sword. The requirement for ingestion of trace...

Revise the following paragraph to improve clarity, brevity, and organization:

As for many food components, the intake of metal ions can be a double edged sword. The requirement for ingestion of trace metals such as Fe and Cu ions to maintain normal body functions such as the synthesis of metalloproteins is well established. However, cases of excess intake of trace metal ions are credited with pathological events such as the deposition of iron oxides in Parkinson's disease [1]. In addition to aiding neurological depositions, these redox active metals ions have been credited with enhancing oxidative damage, a key component of chronic inflammatory disease [2] and a suggested initiator of cancer [3]. As inflammation is a characteristic feature of a wide range of diseases, further potential pathological roles for metal ions are emerging as exemplified by premature ageing [4].

(Look up any terms that you do not understand, and make your best guess at the authors' intended meaning.)