Unless you eat a lot of fruit and vegetables and whole foods it is likely you are potassium deficient. You need to be concerned about this in the long run as potassium is essential to your health.

Potassium has been identified by medical professionals as an agent which reduces blood pressure and therefore reduces the risk of strokes and heart attacks. Further evidence has been clinically substantiated that additional potassium protects against bone loss and the formation of kidney stones.

It's important to note that supplementation of any compound whether mineral or vitamin is only viable if the dietary intake is less than the recommended value. People who regularly eat packaged food will lack the essential compounds necessary to maintain health whereas people who eat natural whole foods including fruit and vegetables will be less likely to be deficient in required nutrients like potassium.

Potassium rich foods.
‣ Potatoes
‣ Bananas
‣ Oranges
‣ Cantaloupe
‣ Apricots
‣ Prunes
‣ Raisins

There are many other foods which contain potassium at lower levels but the amount you would have to consume to get a sufficient dietary dose of potassium will trade off the health benefits of potassium with the amount of calories consumed.
When we speak of supplementing Potassium we are talking about taking Potassium Chloride which is raw potassium extract from vegetables mixed with chlorine to make a metal halide salt. This should never be a substitute for the Potassium you get from normal food and drink, it always should be considered a supplement.

The recommended daily allowance of potassium (RDA) for people aged 19 years and over is an incredible 4,700 mg.
Many supplement vendors sell potassium tablets at around 200mg each, this would mean you'd have to take 20 a day if your potassium intake was zero but don't worry, many things contain potassium including tea, coffee, orange juice and even milk so the labelling is correct, these are always supplements, being supplemental to your existing potassium intake.
Unless you are suffering from a medical condition which requires analysis of your blood potassium levels or you have a private medical team at your beck and call, the only way you will know if you are potassium deficient is by being aware of what you eat and how much of it you eat.
It is noted that increasing intake of potassium decreases the possibility of hypertension (high blood pressure) in approximately 20% of people and increases life expectancy by a number of years.
The modern Western diet has seen a vast reduction in the consumption of fruit and vegetables which are naturally rich in potassium. It's important to note that the reduction of sodium (salt) is required in order to see the health benefits of potassium on blood pressure. Put too much salt on your fries or baked potato and you will negate the benefits of potassium, keep salt low, stay healthy.

Potassium and Bone Health
The results of modern research show that Potassium salts reduce calcium reabsorption levels and excretion of calcium, increasing bone strength.
Potassium salts could prevent osteoporosis: A qualified study suggests that eating fruit and vegetables may improve the strength of bones and potentially reduce the risk of osteoporosis also known as brittle bone disease.

It is essential to consume a wide variety of natural whole food to ensure you are getting all the nutrients required to maintain your health.

Taking supplements is supplemental! Sounds ridiculous but many people believe they can have a bad diet and take a few pills as a remedy, this isn't the case. The case is much more complex than that: this is your body, your health, maintaining symbiosis between the things you eat and the nutritional requirements of your body's tissues including all your organs and your brain is critically important - homeostasis is the ideal condition.