Note:
Due to potential interferences, Vitamin K1 levels cannot be determined in individuals taking Vitamin K2 supplements.
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Several vitamins can be dangerous when you take too much of them, but for most people, vitamin K isn't one of them. The only people who could get too much vitamin K are those taking the blood-thinning medication warfarin.
If you decide you want to increase or decrease your vitamin K intake, it's important to discuss with your doctor the best way to do that, as your dosage may need adjusting either up or down.
If you're taking warfarin, you likely get regular blood tests to determine its efficacy. Your lab results will provide your prothrombin time (PT) and international normalized ratio (INR) values. Your INR values should stay in a safe range; if they are too high or too low, it may be because of the interaction between warfarin and vitamin K.
Vitamin K functions to lower your INR values, which means that warfarin may not be effective for preventing a blood clot. Warfarin increases your INR values, which slows blood clotting. If warfarin is too effective, you will bleed more easily and quickly, which can be dangerous.
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Antiparietal Cell Antibody, Calcitriol (1,25 di-OH Vit D), Copper, Pl, Intrinsic Factor Antibodies (Serum), Intrinsic Factor Blocking Antibody, Manganese, Methylmalonic Acid, Serum, Nicotinamide, Nicotinic Acid, Phosphate (Phosphorus), Retinol binding Protein (RbP), Vitamin A, Vitamin B1 (Thiamine), Vitamin B12, Vitamin B2 (Riboflavin), Plasma, Vitamin B2, Whole Blood, Vitamin B3 (Niacin), Vitamin B6, Vitamin B9 (Folate), Vitamin C, Vitamin D, 25-Hydroxy, Vitamin E (Gamma Tocopherol), Vitamin E (Tocopherol), Vitamin K, Vitamin K1, Zinc, RBC
