OSTROVIT VITAMIN D3 4000 + K2 VEGE. Those who lack these ingredients often complain about general weakness and fatigue, drowsiness, fragile and painful bones, weak muscles, as well as frequent infections.OstroVit Vitamin D3 4000 IU + K2 vege assures a high daily dose of vitamin D3 and K2 MK-7 which proves effective in persons who deal with insufficiency of these ingredients and in seniors aged 75 upwards.