Since its first revision this book has undergone a number of changes that have generally increased its usefulness. However, like others so commonly encountered today, it presents with too little criticism some views that may be currently popular but not supported by adequate evidence. For example, in the discussion of vtiamin E there is the statement:
"It has been shown to be essential for reproduction in rats, mice, rabbits, and hens. It is not definitely known whether other animals can suffer from deficiency of tocopherol, but favourable reports have been published on the use of wheat-germ oil to cure habitual abortion in women, sheep, cows, and pigs. It has been suggested that it might be used in the treatment of various diseases of muscles and nerves."
What is lacking is a statement to the effect that such claims have not been sufficiently substantiated for the medical profession to apply vitamin