Essentially altitude convulsion threshold was taken for determining the resistance to hypoxia.It was found that riboflavin, ascorbic acid and niacin had no anti-hypoxic effect.

• 实验之结果，显示核黄素，菸草酸及维生素丙，均对缺氧之耐受能力无影响，而菸草醯胺则可增强小白鼠对于缺氧之耐受能力。