Growth-Promoting Activity of L-Lyxoflavin.

Abstract
The addition of 15 mg/kg. of L-lyxoflavin to a ration containing isolated soybean protein produced a 10% increase in the growth of chicks to 2 weeks of age. The mode of action is obscure. L-Lyxoflavin has no riboflavin activity in the chick. Since the response was observed in the presence of 50 mg./kg. aureomycin, the effect is probably not due to antibiotic activity of the compound.