Vitamin K and potassium are both essential nutrients, but have different functions and composition. You need both nutrients for a healthy body, but one does not replace the other. Understanding the function of potassium and vitamin K can help you recognize the distinctions between the two. If you are concerned you are not getting enough of these nutrients in your diet, consult your health care provider.
Distinction
As its name suggests, vitamin K is a vitamin, meaning it is a compound made by plants or animals. Potassium is a mineral, an inorganic compound that comes from the earth. Vitamins and minerals are essential to proper body functioning; they support tissue growth, bone health, muscle function, blood composition and brain development.
Vitamin K
Vitamin K is one of four fat-soluble vitamins, so it is dissolved in fat and may be stored in fat tissue. The primary function of vitamin K is to assist in proper blood clotting. Vitamin K may also support bone health, especially in the elderly. Most adults over the age of 19 need about 90 micrograms daily. If you are on blood thinning medications, your doctor may ask you to monitor your intake of vitamin K.
Potassium
Potassium is a mineral that helps you maintain proper fluid and mineral balance. Potassium is an electrolyte, so it is grouped with other electrolyte minerals including sodium chloride, calcium and magnesium. Electrolytes must be in balance to facilitate cell and organ function. Potassium also plays a role in regulating blood pressure, digestion and muscle function. A potassium deficiency is characterized by rapid heartbeat, sluggish digestion and weakness. Too much potassium can stress the kidneys. Most adults need about 2,000 mg of potassium daily.
Food Sources
Both vitamin K and potassium are available in a wide variety of foods. Vitamin K deficiency is rare, especially if you eat plenty of cabbage, cauliflower, spinach, fortified cereals, soybeans and other vegetables. Potassium is also found in vegetables such as sweet potatoes, asparagus and Brussels sprouts. Additionally, you can obtain potassium from fruits such as bananas, mangoes, papayas and orange juice; dairy products including yogurt, milk and cottage cheese; and protein foods such as pinto beans and salmon.
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