Vitamins and Coenzymes by Wagner and Folkers is essentially a reference work. Even though the field dealt with is one subject to extensive research at this time, the method of presentation of data, with a clear separation of proved fact and deduction from available facts, means that the investigator will find it an invaluable summary of research to the date of publication. The amount of material condensed into less than 600 pages is in itself a measure of the concise clarity of the writing.
The two introductory chapters are short, clear statements of the premises to be used in the following chapters. An historical introduction of the evolution of the vitamin theory and the relation of vitamins to essential enzyme systems is followed by a definition of a vitamin proposed by these authors. The definition may not be completely acceptable to all investigators, particularly the distinction of a nutrilite as