To naturally thicken your blood, eat more vitamin K. This essential nutrient is found in leafy greens and vegetables like broccoli. ... This can be especially dangerous during surgery, since the blood will not be able to clot properly. Even cuts and wounds may bring on the risk for significant blood loss. read more
No foods thicken blood per se. The effect of Vitamin K, a fat soluble vitamin, is the only vitamin that causes the blood to run “thin”, i.e. not coagulate as quickly. read more
Vitamin K deficiency is rare; however, it can occur in people with disease that may affect the absorption of vitamin K or in people on long-term antibiotic therapy. If deficiency does develop, symptoms include easy bruising and bleeding that may occur as nose bleeds, bleeding gums, excessive menstrual bleeding or blood in the urine. read more
Some foods that thicken blood are parsley, kale, spinach, collard greens and asparagus, all which have high levels of vitamin K, states DVT Lite. In its supplement form, vitamin K is prescribed to people who have thin blood. read more