Aperson who required a prolonged clotting time would most likely be deficient in:

In vitamin k. The most widely recognized reasons for vitamin K lack are a deficient dietary admission, insufficient retention, and diminished stockpiling of the vitamin because of liver infection, yet it might likewise be caused by diminished generation in the digestion tracts. 

A vitamin K lack in grown-ups can prompt coronary illness, debilitated bones, tooth rot, and tumor. A notice indication of a vitamin K inadequacy is draining and wounding effectively. This draining can start as an overflowing from the gums or nose.