Glossary
Iron is present in all the cells of the body, usually in combination with protein. Iron's primary function is the manufacture of haemoglobin, which is integral to the transport of oxygen throughout the body. Iron is also essential for healthy immune function and energy production. Research suggests it may additionally play a role in protecting cells and tissues from damage due to oxidation.

Among the best food sources of iron are beef, Brewer's yeast, kelp, molasses, organ meats, dark green leafy vegetables, legumes, oysters, and sardines. In supplement form, it is best taken with vitamin C, which aids in its assimilation.
Manganese supports a variety of enzymatic reactions in the body, and is essential for proper brain function and the overall health of the nervous system. it also helps metabolize proteins and carbohydrates, and is required for cholesterol and fatty acid synthesis, as well as collagen formation. The best food sources of manganese are green leafy vegetables (especially spinach), nuts, organ meats, and wholegrain breads and cereals.

Manganese deficiency in humans is rare. Deficiency symptoms include dizziness, hearing problems, and weakness.

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