Vitamin K deficiency is very rare. Most people get enough vitamin K from the foods they eat. Also, bacteria in the colon make some vitamin K that the body can absorb.
Certain groups of people may have trouble getting enough vitamin K:
Severe vitamin K deficiency can cause bruising and bleeding problems because the blood will take longer to clot. Vitamin K deficiency might reduce bone strength and increase the risk of getting osteoporosis because the body needs vitamin K for healthy bones.
Foods that you should consider incorporating into your diet include:
Some medications may interact with vitamin K. Here are a few examples:
Warfarin (Coumadin):
Vitamin K can have a serious interaction with the blood thinner warfarin (Coumadin). If you take warfarin, make sure that the amount of vitamin K you consume from food and supplements is about the same every day. A sudden change in the amount of vitamin K you get can cause dangerous bleeding (if you consume less) or blood clots (if you consume more).
Antibiotics:
Antibiotics can destroy the good bacteria in your gut. Some of these bacteria make vitamin K. Using antibiotics for more than a few weeks may reduce the amount of vitamin K made in your gut and, therefore, the amount available for your body to use.
Bile acid sequestrants:
Some people take bile acid sequestrants (such as cholestyramine [Questran] and colestipol [Colestid]) to lower blood cholesterol levels. These medications can reduce the amount of vitamin K your body absorbs, especially if you take them for many years.
Orlistat:
Orlistat (Alli and Xenical) is a weight-loss drug. It reduces the amount of fat your body absorbs and can decrease the absorption of vitamin K.
Always read the label. Follow the directions for use. If symptoms persist, consult your healthcare professional. Vitamin supplements should not replace a balanced diet. If you have any pre-existing conditions, or are on any medications always talk to your health professional before use. Store your daily packs below 25°C in a cool, dry place, away from humidity and direct sunlight.