The Wistar line white rats were introduced individually or in different ratios vitamins В1 and В2 and measured the influence each of them on intensity of biosynthesis of coenzyme form of the other. It is established that there is an optimum ratio according to this index for this pair of vitamins В1 and В2: after the weight 6:1, after the molarness — 5:1. The doses of vitamins close to physiological (or therapeutic) were used.
