Abstract
Summary
Cultures of skin and brain (ectodermal derivatives) and heart (mesodermal derivative) in the presence of the B complex vitamins in certain concentrations, grew as well as, or slightly better than their own controls without vitamins. From the results of all the experiments the conclusion must be drawn that the added B complex vitamins have a negligible growth stimulating effect upon tissue cultures of skin, brain and heart. However, they did seem to affect favorably the longevity of the cultures, particularly those of brain, with biotin or folic acid. These outlived the majority of their controls in good (biotin) and excellent (folic acid) condition by a span of days more than once again as long.
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