Compiled and calculated from data in Food Standard Agency (2002) McCance and Widdowsois The Composition of Foods, 6th Summary edn. Cambridge: Royal Society of Chemistry.

be widespread. Although even a severe riboflavin deficiency is less obviously life-threatening than some other types of malnutrition that are commonly encountered in the Third World, it can nevertheless cause debility, through skin lesions and metabolic dysfunctions, and riboflavin-nutriture thus deserves an important place in future public health programs.

As with most other B vitamins, riboflavin and its cofactors are remarkably nontoxic even at high intakes. The reasons for this are probably associated with limitations on absorption, once the active transport process has become saturated in the gut; coupled with very effective urinary excretion of any absorbed vitamin that is in excess of cellular requirements.

See also: Antioxidants: Diet and Antioxidant Defense. Fatty Acids: Metabolism. Iron. Vitamin B6.

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