Both haem and non-haem iron are a part of many enzymes that are involved in:
• cellular respiration
• amino acid metabolism (e.g. carnitine)
• detoxification (as part of cytochrome P450 enzymes in the liver)
• protection against free radical damage
• synthesis of nutrients such as vitamin A
• synthesis of hormones and neurotransmitters (serotonin and noradrenaline)
• synthesis of collagen and elastin.
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