Tofu and Warfarin

Publication Date: 
By: Alere Staff

Tofu is a popular food made from soy beans that is natural, inexpensive and nourishing.1 In contrast to other soy products consumed in the U.S., tofu is, by nature, a basic whole food that has not been highly processed.When foods are highly processed, it changes the product significantly along with some of its health benefits.The soy in tofu has even less processing than the soy found in soy milk and soy burgers.

Replacing meat and dairy products with tofu and other soy products can have health benefits such as lowering cholesterol. It also increases the intake of important nutrients and vitamins such as folate, vitamin K, magnesium, calcium, iron and fiber. Tofu, especially fermented tofu, has been shown to improve cardiovascular health. In addition to decreasing cholesterol, fermented tofu breaks down into particles that have antioxidant, anti-inflammatory and blood pressure-lowering properties.1

Tofu and Vitamin K

Patients taking warfarin should pay close attention to the amount and consistency of vitamin K in their diets. According to our Vitamin K Finder available on our® website, tofu is a food with low vitamin K content. Miso is a form of fermented tofu and therefore has more vitamin K as fermentation of foods tends to increase the vitamin K content.2 To view how the preparation of tofu can change vitamin K content, check out tofu on our Vitamin K Finder.

If tofu is being added to your diet, especially if fried or in the fermented form, your INR may need to be checked to ensure your total vitamin K intake is not impacting your INR level. Consistent intake of vitamin K amounts are important to help keep the INR in range week to week. 


1.'s New and Beneficial About Tofu