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Are cooked collard greens high in potassium?


Collard greens are a nutritious leafy green vegetable that have been consumed for centuries for their health benefits. They are a good source of many vitamins, minerals and antioxidants. One of the minerals they provide is the electrolyte potassium. Potassium is an important nutrient that many people don’t get enough of. Getting adequate potassium in your diet can help lower blood pressure, reduce risk of heart disease and stroke, and support bone health. In this article, we will explore whether cooked collard greens are considered high in potassium or not.

Potassium Content in Collard Greens

The potassium content in collard greens depends on whether they are raw or cooked. According to the USDA, 1 cup (36g) of raw chopped collard greens contains around 0.139g of potassium. Whereas 1 cup (190g) of cooked chopped collards contains 0.489g of potassium.

So while raw collard greens contain some potassium, the total amount is relatively low compared to other potassium-rich foods. However, cooking collard greens concentrates the nutrients, increasing the potassium content.

To put these numbers into perspective, the recommended daily intake of potassium for adults is 4,700mg per day. Most Americans fall short of this, only getting around half of the recommended amount. A cup of cooked collard greens provides 489mg potassium, so would fulfill around 10% of the daily recommended intake.

Highest Potassium Foods

While cooked collard greens contain a decent amount of potassium, there are many other foods that are significantly higher. Here is a table comparing the potassium content of cooked collard greens to other high potassium foods:

Food Serving Potassium (mg)
Beet greens, cooked 1 cup 1309
White beans 1 cup 1004
Cooked spinach 1 cup 839
Avocado 1 whole 708
Baked potato, with skin 1 large 610
Banana 1 medium 422
Cooked collard greens 1 cup 489

As you can see from the table, while cooked collard greens contain a good amount of potassium, there are many other foods that are significantly higher like beet greens, beans, potatoes, and bananas.

Daily Potassium Needs

Most health organizations recommend getting at least 4,700mg of potassium per day. However, those with certain medical conditions like kidney disease may need to restrict their intake and aim for lower amounts.

The adequate intake (AI) levels for potassium are:
– Adults: 4,700mg
– Pregnant women: 4,700mg
– Breastfeeding women: 5,100mg
– Children:
– 1–3 years: 3,000mg
– 4–8 years: 3,800mg
– 9–13 years: 4,500mg

Getting adequate potassium is important to help reduce blood pressure, risk of kidney stones, bone loss, and possibly stroke. Deficiency can cause muscle cramps, weakness, and heart palpitations.

While many people do not hit the recommended 4,700mg/day, adding potassium-rich foods like collard greens, spinach, beans, avocado, banana and potatoes to your diet can help increase intake.

Potassium Content of Collard Greens and Other Foods

Below is a detailed table showing the potassium content of collard greens as well as other foods. It shows the potassium amounts in milligrams per 100 gram edible portion:

Food Potassium (mg per 100g)
Dried herbs 1420
Baked potato with skin 528
Prunes, stewed 499
Beet greens, cooked 374
White beans 336
Yogurt, plain, nonfat 255
Avocado 246
Cooked spinach 230
Salmon, Atlantic, farmed, cooked 228
Banana 185
Sweet potato, baked with skin 180
Tomato juice 170
Cooked collard greens 132

This makes it easy to compare potassium across many different food items. Dried herbs, baked potatoes, prunes, beet greens and white beans are some of the highest. While collard greens contain a moderate amount of potassium at 132mg per 100g when cooked.

Ways to Increase Potassium from Collard Greens

Here are some tips to get more potassium from collard greens:

– Cook collards rather than eating raw – cooking concentrates the potassium content
– Use larger collard leaves – the bigger leaves contain more potassium than smaller leaves
– Add other potassium-rich ingredients like beans, potatoes, or avocado to collard dishes
– Make a large batch of collards and enjoy leftovers for extra potassium
– Blend collards into smoothies along with banana, yogurt or spinach
– Pair collards with baked sweet or white potatoes for additional potassium
– Choose collard varieties like Champion, Georgia Southern, or Vates – these tend to be higher in nutrients
– Add collards to soups, stews, casseroles and stir-fries to increase potassium intake

Consuming potassium-rich foods like collard greens regularly can help meet your recommended daily needs and reduce risk of potassium deficiency. Aim for at least 4-5 servings of potassium-rich fruits and vegetables daily as part of a balanced diet.

Health Benefits of Potassium

Getting enough potassium provides many health benefits:

1. Helps Lower Blood Pressure

Consuming foods high in potassium has been shown to lower blood pressure, potentially reducing risk of hypertension and related health issues like stroke. The mechanism is believed to be related to potassium helping counterbalance excess sodium in the diet.

2. Reduces Risk of Kidney Stones

Higher dietary potassium is linked to lower risk of developing kidney stones. Kidney stones can cause severe pain and may require medical procedures to remove them.

3. Supports Bone Health

Adequate potassium intake helps preserve bone mineral density as we age, reducing risk of osteoporosis and bone fractures.

4. Aids Muscle Function

Potassium helps muscles contract and nerve impulses transmit. Deficiency can cause muscle cramps, spasms, and fatigue.

5. Helps Reduce Stroke Risk

Diets higher in potassium are associated with lower rates of stroke. Potassium is believed to play a protective role through its blood pressure lowering effects.

While the mechanisms are still being understood, consuming adequate potassium seems to have multiple benefits for heart health, kidney function, and preventing age-related bone loss.

Risks of Potassium Deficiency

Many people do not get the recommended daily amount of potassium in their diet. Low dietary potassium over time can lead to deficiency.

Symptoms of potassium deficiency include:

– Muscle weakness and cramps
– Fatigue
– Constipation
– Heart palpitations
– Low blood pressure
– Tingling or numbness
– Mental confusion or apathy

Severe deficiency is rare but can impair kidney function, result in abnormal heart rhythms, and even lead to death in extreme cases. Those at higher risk include people taking certain medications like diuretics or laxatives, having chronic digestive issues like diarrhea, or medical conditions like diabetes or kidney disorders.

Maintaining adequate potassium intake from foods like collard greens helps prevent deficiency and related adverse effects. Those with kidney issues or taking certain medications should have their potassium status monitored and intake restricted if needed.

Risks of Too Much Potassium

While deficiency is more common, there are some risks associated with too much potassium as well.

Having dangerously high potassium levels is called hyperkalemia. It is generally rare in healthy people and caused by underlying medical conditions or certain medications.

However, people with impaired kidney function cannot adequately excrete potassium. So they are at risk of hyperkalemia if potassium intake becomes too high. That’s why those with chronic kidney disease are often advised to limit potassium-rich foods.

Symptoms of hyperkalemia may include:

– Nausea
– Diarrhea
– Stomach pain
– Muscle weakness
– Tingling or numbness
– Slow or abnormal heart rate
– Chest pain

Extremely high potassium levels can potentially cause life-threatening heart rhythm disturbances (arrhythmias).

Again this condition is uncommon in healthy people eating normal diets. But those with kidney disorders should have their potassium intake monitored and restricted by a healthcare provider if elevated levels occur.

Who Should Restrict or Limit Potassium Intake?

Certain individuals may need to limit dietary potassium, including:

– Those with chronic kidney disease, especially in advanced stages
– Patients undergoing dialysis for kidney failure
– People taking medications that impair potassium excretion like ACE inhibitors or ARBs for high blood pressure
– Those with acute kidney injuries that reduce potassium excretion
– People taking potassium-sparing diuretics
– Those with diseases causing too much aldosterone like Conn’s syndrome (hyperaldosteronism)
– Individuals experiencing recurring periods of hyperkalemia

People in these groups are at higher risk of elevated potassium levels and may need their intake limited to 2000-3000mg daily, under medical supervision. They should avoid extremely high potassium foods and may need to restrict intake of moderately high sources like collard greens, beans, potatoes, and bananas.

However for most healthy individuals, dietary potassium from foods poses no risks and provides beneficial effects. Unless advised otherwise by your healthcare provider, enjoying foods like collard greens as part of balanced eating pattern is recommended.

Maximizing Potassium Absorption from Collard Greens

To get the most potassium from collard greens, consider these preparation and serving tips:

– Chop or slice greens into smaller pieces to make chewing and digestion easier, releasing more potassium. Blending into smoothies also works.

– Cook collards thoroughly until tender – cooking breaks down plant cell walls, increasing bioavailability of potassium and other minerals.

– Pair collards with a source of dietary fat like olive oil, avocado, or nuts. The fat helps your body absorb fat-soluble vitamins like potassium.

– Add a squeeze of lemon or other citrus juice – vitamin C helps increase absorption of plant-based potassium.

– Avoid overcooking greens into mush, which can damage nutrients. Cook just until leaves are tender.

– Choose frozen collards – freezing helps disrupt cell walls, releasing more potassium from leaves once heated.

– Don’t discard the cooking liquid from collards, which retains water-soluble potassium. Use it for gravy, soups, stews.

Proper storage and preparation of collard greens helps maximize the potassium content. By chopping, cooking, and pairing with fats and vitamin C, you can optimize the potassium absorbed from enjoying these tasty leaves.

Potassium Supplements

While dietary potassium from whole foods like collard greens is best, some people may need to supplement, including:

– Those who cannot meet needs sufficiently through foods alone
– Individuals taking potassium-depleting medications like diuretics
– People with chronic diarrhea, vomiting, or digestion issues
– Those with kidney disorders restricting high-potassium foods

Potassium supplements are available in tablet, capsule, powder, and liquid forms. Common doses range from 50-100mg. Higher doses may be prescribed for those with certain deficiencies or using medications that deplete levels.

Most people can meet potassium needs through foods without requiring supplements. But check with your healthcare provider if you have digestion issues, are taking certain medications, or have a condition that affects potassium status. Supplements may be warranted in some cases to prevent deficiency.

Those with impaired kidney function should avoid supplements except under close medical supervision due to hyperkalemia risks. High-dose supplementation can be dangerous and life-threatening for those unable to excrete excess potassium.

Collard Greens and Potassium: The Bottom Line

Collard greens provide a moderate amount of the important mineral potassium, at around 132mg per 100g when cooked. So while they do not qualify as very high or excellent sources, collards can still contribute valuable potassium intake as part of an overall healthy diet.

The benefit of potassium-rich foods like collards include reducing blood pressure, supporting bone and muscle health, and decreasing risk of kidney stones and possibly stroke. Most people likely do not meet the recommended 4700mg of potassium per day, so including collard greens and other sources like beans, sweet potatoes, bananas, spinach and tomatoes can help increase intake.

Enjoy collard greens cooked and paired with healthy fats or citrus juice to maximize potassium absorption. Use larger leaves and stems to obtain more potassium. Adding collards to soups, stews, and other mixed dishes can also boost potassium intake throughout the day.

Those with kidney disorders, taking certain medications, or prone to hyperkalemia for other reasons may need to restrict dietary potassium like that found in collard greens. Work with your healthcare provider to determine your individual needs and optimal potassium intake from foods and supplements.

But for most healthy people, consuming nutritious greens like collards along with a variety of other fresh, whole foods can help provide beneficial potassium to support muscle function, heart health, and metabolic wellbeing.


In summary, collard greens contain a moderate amount of the mineral potassium, providing about 132mg per 100g cooked. So while they are not among the very highest potassium sources, collards can still meaningfully contribute to total daily potassium intake. Enjoying collard greens along with other potassium-rich foods like spinach, tomatoes, potatoes, beans, yogurt and banana can help meet the recommended daily target of 4700mg. Adequate potassium consumption provides multiple benefits for heart health, bone density, muscle function and kidney stone prevention. For most healthy people, dietary potassium from whole foods poses no risks and offers health advantages. Those with kidney disorders or prone to hyperkalemia may need to restrict intake under medical supervision. But overall, incorporating nutritious cooked collard greens as part of a balanced diet can help provide beneficial potassium to support overall health.