Which item is described as causing blood clots?

Which item is described as causing blood clots?

• A. Vitamin K
• B. Salt
• C. Grapefruit
• D. Antibiotics

Answer: (B)

Vitamin K directly enables clot formation. It is required for the liver to activate several clotting factors (II, VII, IX, and X) and proteins C and S; with vitamin K available in adequate amounts, the coagulation cascade can proceed and fibrin clots form. In practical terms, this is why vitamin K intake influences clotting risk and why it’s described as contributing to blood clots when discussing coagulation. The other items don’t directly trigger clot formation. Salt mainly affects fluid balance and blood pressure, which are cardiovascular risk factors but not the coagulation cascade itself. Grapefruit influences drug metabolism and can change levels of certain medications but doesn’t inherently cause clots. Antibiotics can alter gut bacteria and vitamin K production, potentially affecting bleeding risk rather than directly promoting clot formation.

Vitamin K directly enables clot formation. It is required for the liver to activate several clotting factors (II, VII, IX, and X) and proteins C and S; with vitamin K available in adequate amounts, the coagulation cascade can proceed and fibrin clots form. In practical terms, this is why vitamin K intake influences clotting risk and why it’s described as contributing to blood clots when discussing coagulation.

The other items don’t directly trigger clot formation. Salt mainly affects fluid balance and blood pressure, which are cardiovascular risk factors but not the coagulation cascade itself. Grapefruit influences drug metabolism and can change levels of certain medications but doesn’t inherently cause clots. Antibiotics can alter gut bacteria and vitamin K production, potentially affecting bleeding risk rather than directly promoting clot formation.