Contraindications and allergies
Although great for your health, beets may not be for everyone. For good reason, the vitamin K it contains in quantity can interfere with certain drug treatments, particularly anticoagulant treatments.
Vitamin K and blood thinners
Beet leaves contain a high amount of vitamin K, which is necessary for blood clotting, among other things. Health Canada recommends that people who take anticoagulants daily (Coumadin®, Warfilone®, Sintrom®) limit their consumption of beets and ensure that their daily vitamin K intake is as stable as possible. Portions should not exceed 125 ml (1/2 cup) of raw beets, or about 60 ml (1/4 cup) of cooked beets.