vitamin k1 added dietary group and the mk 4 added dietary group fig5 and fig6 fig7 shows the results of testis vitamin k concentration right vitamin k1 and left mk 4 the testis mk 4 concentration significantly increased in the vitamin k1 added dietary group and the mk 4 added dietary group it is thought that vitamin k1 was converted to mk 4 in the body fig8 shows changes in blood testosterone values the blood testosterone values of the vitamin k1 added dietary group was not seen to differ from those of the control dietary group at four weeks and five weeks at two weeks and three weeks the blood testosterone values of the vitamin k1 added dietary group was higher than those of the control dietary group when an overall two way layout analysis of variance was performed the significant difference was determined to be p lt 0 01 fig9 shows testis testosterone concentration results the testosterone values were high in both the vitamin k1 added dietary group and the mk 4 added dietary group from the above described results it is clear that vitamin k1 and vitamin k2 menaquinone 4 increase the blood testosterone level and the testis testosterone level administration of vitamin k2 is preferable because changes in weight and changes in diet intake are not seen increase of testosterone using vitamin.