Your body can actually manufacture it's own vitamin K. The digestive flora in your large intestines make vitamin K which your body can use. Supplementing with a probiotic supplement will indirectly increase vitamin K levels in your body.
Remember that vitamin K is a fat soluble vitamin. So if you use a vitamin K supplement or increase your intake of green leafy vegetables, make sure to include a healthy dietary fat source along with the meal so your body absorbs the vitamin K efficiently.