∗ The Assay of Vitamins K 1 and K 2

Abstract

Summary

1. 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.