People taking anticoagulants should carefully monitor their _________ intake, because it could decrease the effectiveness of the medication.

• A. Vitamin A.
• B. Vitamin D.
• C. Vitamin E.
• D. Vitamin K.

Answer: (D)

Verified step by step guidance

1. Understand the role of anticoagulants: Anticoagulants are medications that help prevent blood clots by reducing the ability of the blood to coagulate. Vitamin K plays a critical role in the blood clotting process.
2. Learn about Vitamin K's function: Vitamin K is essential for synthesizing certain proteins required for blood clotting. High intake of Vitamin K can counteract the effects of anticoagulants, making them less effective.
3. Identify dietary sources of Vitamin K: Foods rich in Vitamin K include green leafy vegetables (e.g., spinach, kale, broccoli), certain oils, and fermented foods. Patients on anticoagulants should monitor their consumption of these foods.
4. Understand the interaction mechanism: Anticoagulants like warfarin work by inhibiting Vitamin K-dependent clotting factors. Excessive Vitamin K intake can reduce the medication's effectiveness, leading to potential health risks.
5. Apply this knowledge: Patients taking anticoagulants should consult with healthcare professionals to establish a consistent Vitamin K intake and avoid sudden dietary changes that could affect medication efficacy.