The Assay of Vitamins K1 and K2

Abstract

Summary1. The potency of Vitamin K1 is approximately 1000 of our units per milligram; K2 approximately 660. 2. The 18-hour assay procedure gives satisfactory results. 3. In a slightly modified Almquist 7-day curative method, 80 micrograms per kilo of diet of K1 and 160 micrograms per kilo of diet of K2 are adequate.