Several widely available foods are rich sources of vitamin K1, but vitamin K2 is less common.
Your body can partly convert vitamin K1 to K2. This is useful because the amount of vitamin K1 in a typical diet is nine times that of vitamin K2. However, only 10-15% of ingested vitamin K1 is absorbed in the digestive tract, so actual absorbed K1 makes up about 50% of all vitamin K in the diet.