Worry More About Magnesium and Potassium

People tend to be most concerned with nutrients that the majority of younger people aren’t at risk for being deficient in, like B12 or protein. If you eat animal protein or a very well-planned vegetarian diet and are under the age of 60, you’re likely ok on these two. What you’re probably not OK on is magnesium and potassium, though, and that’s a really big deal. Consider that fewer than 2% of Americans meet the daily recommendation for potassium – less than 2%! Potassium is crucial for good health, because it:

  • controls the electrical activity of the heart
  • regulates acid-base balance and normal water balance
  • has a big impact on muscle contraction and appears to protect against muscle wasting
  • decreases blood pressure and arterial stiffness (which leads to heart attack, stroke, and dementia if left unchecked)
  • plays a factor in bone health
  • helps to prevent kidney stones
  • is important for nerve transmission and function

What’s especially sad about the fact that potassium intake is so low in the Standard American Diet (SAD) is that it’s packaged with lots of other nutrients in foods like: bananas, cantaloupe, oranges, peaches, sweet potatoes, tomatoes, leafy greens, milk, whole grains, nuts, beans, and salmon (among others). Hit the produce aisle hard if you want to improve your potassium intake. Symptoms of potassium deficiency include bone fragility, muscle weakness and cramping, tingling or numbness of the extremities, abnormal psychological behavior, fatigue, and sterility.

A whopping 75% of Americans are magnesium deficient. Magnesium is thought to aid in the treatment of many disorders including fibromyalgia, diabetes, chronic fatigue syndrome, depression, migraines, and hypertension. It’s important because it:

  • helps to keep the cells of your muscles and nerves working well
  • helps to maintain normal blood glucose and insulin levels
  • helps to regulate blood pressure
  • helps to keep your heart rate steady
  • plays a role in immunity
  • assists in maintaining bone health
  • aids us in combatting stress

Magnesium can be found in: green vegetables, beets, bananas, potatoes and sweet potatoes, beans, nuts, whole grains, fish, tofu, milk, and soybeans (among others).

Symptoms of magnesium deficiency are similar to those of potassium deficiency and include: nausea, fatigue, trouble sleeping, irritability, pain, weakness, numbness and tingling of the extremities, muscle contraction and cramps, heart arrhythmia and personality changes. I don’t know about you, but a lot of the people that I talk to on a daily basis complain of similar symptoms. A lot of pain (like back or hip pain), insomnia, anxiety and irritability, and fatigue…we chalk it up to a high-stress lifestyle, which is pretty spot-on, because magnesium helps us to handle stress better. Instead of pharmaceuticals, maybe we just need more oatmeal or green vegetables, for example.

Magnesium deficiency is associated with low levels of potassium in the blood and severe magnesium deficiency can result in low levels of calcium in the blood. Magnesium, potassium, and calcium are cornerstones of the ultra-healthy DASH diet (Dietary Approaches to Stop Hypertension), which is widely-regarded to be the healthiest diet of all.

I wondered what someone would have to eat in a day to meet their requirements for both potassium and magnesium; the diet below would provide enough potassium (4731 mg; both males and females over the age of 14 years need 4,700 mg a day) and more than enough magnesium (541 mg; a female between the ages of 31 and 70 need 320 mg a day and a male of the same age needs 420 mg a day).

Breakfast:  2 slices whole wheat toast with 2 Tablespoons of peanut butter, 1 orange, 1 cup of milk

Snack: 1 ounce pistachios and a medium banana

Lunch: A grilled chicken and strawberry salad, a container of low-fat yogurt, and 1 ounce of sunflower seeds

Dinner: 3 oz pork tenderloin, 1/2 cup cooked quinoa, 1/2 cup cooked spinach, and 1 medium sweet potato

Snack: 1 cup of cantaloupe

When I look at that, it looks pretty doable to me, and I hope that you feel the same. People who eat a lot of processed foods or consume large amounts of alcohol are quite likely to be deficient in a slew of nutrients, including both of these important minerals. People who drink a lot of coffee or soda, or eat a lot of salt, are especially likely to be magnesium deficient. One side note: people who have kidney disease and/or take blood pressure medications such as ACE inhibitors should find out from a doctor if they should avoid high-potassium foods.