ACE Health Coach Certification Practice Test 2026 - Free Health Coach Certification Practice Questions and Study Guide

Vitamin E is particularly hazardous in high amounts for individuals taking anti-clotting medications like Coumadin (warfarin) because it has blood-thinning properties. When consumed in excessive amounts, vitamin E can enhance the effects of these anticoagulant medications, potentially leading to an increased risk of bleeding. This interaction occurs because both vitamin E and the medication can affect blood viscosity and clotting factors, which might overpower the medication’s intended dosage and lead to adverse health outcomes.

In contrast, iodine, vitamin D, and phytochemicals do not exhibit the same risk of excessive bleeding when taken in conjunction with anticoagulants. Iodine is primarily associated with thyroid function and does not interact with blood coagulation processes. Vitamin D plays a role in bone health and immune function but is not known to interfere with clotting mechanisms in the way vitamin E does. Phytochemicals refer to a broad category of compounds found in plants that can have various health effects, but not all phytochemicals have blood-thinning properties, and their impact on clotting varies greatly depending on the type. This understanding illustrates why particularly high doses of vitamin E pose a risk for patients on anticoagulant therapy.