METHODS OF ASSESSING B VITAMIN REQUIREMENTS 261 



Thus, we find that extensive methodology has accrued about the 

 assessment of B vitamin requirements. No single method as yet developed 

 is perfect or free from just criticism. The extent to which more accurate 

 methods of assessment are required is in itself questionable in view of 

 the many factors influencing the requirements. Since the very nature of 

 the nutritional B vitamin requirement is largely a mosaic of these other 

 factors, it seems quite essential to consider them in some detail in the 

 following chapter. 



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