Abstract
After intraperitoneal injection of nicotinic acid, FMN and riboflavin tetranicotinate (B_2-Nic) into rats, the amounts of free fatty acid, triglyceride, phospholipid and cholesterol in the serum were studied on time schedule. Free fatty acid was decreased in a short time after the injection of nicotinic acid and B_2-Nic, though the decrease by B_2-Nic seemed to be somewhat delayed, but it again increased to the higher value than the normal, 8 hours after the injection. On the contrary, it was increased in a short time after the injection of FMN. Triglyceride was markedly decreased by nicotinic acid and B_2-Nic, and considerably by FMN. Cholesterol and phospholipid was also decreased by all these compounds to some extent.
