The absolute necessity of an adequate supply of vitamin B, in the dietary of growing animals, if growth is to be maintained at a normal rate, is a fact that has been established beyond question. Among the earlier observations on this point were those of Osborne and Mendel,1 Hopkins2 and Stepp.3 These authors, working independently, arrived at the same conclusions, although their ideas as to the nature of the hypothetic substance were at variance. Since that time, research has led to the demonstration of vitamin B in "milk, rice, wheat embryo, cotton seed, pancreas, maize kernel, wheat, oat, kidney beans, yeast, ivy beans, peanut meal"4 and many plants used as food in the form of "greens," such as asparagus, celery, dandelions and lettuce.5
An adequate supply of vitamin B is necessary not only because of the growth stimulating properties of the vitamin itself but also
DAMON SR. OBSERVATIONS ON THE DISTRIBUTION OF VITAMIN B. JAMA. 1922;79(2):128–129. doi:10.1001/jama.1922.02640020040011
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