For the most effective potassium removal, potatoes must be cut into small pieces, sliced thin or grated. If boiled at least 10 minutes in a large pot of water, potassium is reduced by at least half the original amount.
Objective(s): Despite the nutritional benefits of potato tuber, patients with chronic kidney disease (CKD) should limit the consumption because of its high potassium content.
Leaching method: Peel and dice potatoes. Place in a large pot of warm tap water and soak for 2 to 4 hours. Drain and set aside.
MYTH #2. MOST COOKING METHODS DESTROY THE NUTRIENTS IN POTATOES. While boiling potatoes does cause a small loss of water-soluble nutrients like vitamin C and vitamin B6, the white potato retains most, if not all, of its potassium and dietary fiber regardless of cooking method, such as baking, boiling, or frying.
According to Julie Upton, MS, RD, and member of our Medical Expert Board, the healthiest way to eat your potatoes is to leave the skin on and bake them. "The healthiest way to eat a potato is baking it with the skin on," says Upton. "Baked potatoes add no additional calories like frying or roasting with oil."
You can double boil the potatoes to lower potassium. First cut the potatoes in small pieces. Boil them in water until half cooked. Change the water, boil until cooked, then throw the water out.
While researchers found that neither soaking a fresh raw potato or normal cooking achieved a sufficient reduction in potassium, a soaking procedure performed after normal cooking leached up to 70% of the potassium (final values of under 130 mg/100 g).
While potassium is not affected by microwave cooking, other nutrients are, particularly heat-sensitive and water-soluble vitamins.
Results: Mean potassium content was highest in the purple Viking potato (448.1 6 60.5 mg [11.5 6 1.6 mEq]/100 g [values are mean 6 SD unless otherwise noted]), and lowest in the Idaho potato (295 6 15.7 mg [7.6 6 0.4 mEq]/100 g).
Beta-Carotene Benefits
Beta-carotene, the water-soluble form of vitamin A in carrots, helps the kidneys filter toxins out of the blood and prevent urinary tract infections, according to Dr. George D.
Potatoes are high in potassium (also know as “K”) which is a nutrient that must be limited when following a diet to manage kidney disease. People following a kidney-friendly diet can cut up and soak their potatoes in water to reduce their potassium content.
Frying potatoes in oil lowered phosphorus content by 37%, whereas steaming them reduced phosphorus content by 27%. Roasting frozen hake in oil led to a 49% decrease in phosphorus content.
Egg whites provide a high quality, kidney-friendly source of protein. Plus, they're an excellent choice for people undergoing dialysis treatment, who have higher protein needs but need to limit phosphorus.
A baked potato is more nutrient-dense, providing 6 grams of protein and 6 grams of fiber. It has about 25 percent more magnesium as a boiled potato. It also contains 40 percent more phosphorus and potassium, as well as four times the amount of folate in a boiled potato.
Put limits on phosphorus- and potassium-laden foods.
To keep phosphorus and potassium levels at a minimum, cut out or reduce your intake of dairy products (milk, cheese, ice cream, creamy soups, chocolate), dried beans, peas, nuts and peanut butter.
In general, longer cooking methods also mean higher chances of nutrient loss when cooking produce. Because microwaving can sometimes significantly lower the cooking time (five minutes instead of the 15 it would take to boil for veggies like Creamer potatoes) it can help to preserve nutrients as well as flavor!
Fish and seafood
Cod, flounder, halibut, whitefish, catfish, salmon, tuna steaks and shrimp are good choices for your kidney diet.
The humble potato often doesn't get as much nutrition attention as it deserves. One medium potato delivers 610 mg of potassium, or roughly 17% of the daily value (DV). That's about 40% more potassium than you'll find in a banana, which only contains 422 mg, or 9% DV.
The theory is that a potato is the perfect vehicle to absorb excess salt. Just throw it into the pot and simmer it for awhile, remove it after it's absorbed some of the salt, and you're left with less-salty soup. No need to add more liquid or other ingredients to help disperse the extra salt.
Conclusions: Soaking foods in hot water for 5-10 minutes reduces potassium and phosphorus content. Using this technique to prepare foods may be a more acceptable alternative to longer demineralization periods making it easier for adults living with chronic kidney disease to follow diet recommendations.