The role of glutathione is so important that experts have nicknamed it, ‘‘the king of antioxidants.’’ Glutathione is a tripeptide — a compound made up of three amino acids (cysteine, glucose and glutamic acid), and although it is naturally synthesised by the body, it is also readily available in certain food sources, which brings us to our next point. Like many good-for-us nutrients, levels of glutathione drop with age, so we’d all benefit from increasing dietary forms of the antioxidant to enable our body do its job even better. These are the diet rules to follow…