Dr. Andrei Tyagelnikov, Head of Primary Healthcare for Adults at the Moscow Health Department, has warned patients with kidney disease, diabetes, and irritable bowel syndrome against eating bananas. According to him, this warning also applies to patients with varicose veins and complications after a heart attack. «Although bananas are rich in vitamins, they have strict contraindications. Eating bananas with other types of food can lead to hyperkalemia,» the doctor said. He also pointed out that, according to some reports, bananas can increase blood viscosity, so people with varicose veins, thrombophlebitis, or who have had a heart attack are advised not to consume them. For patients with chronic kidney disease or hyperkalemia (high potassium levels in the blood), eating bananas can worsen their condition». In addition, diabetic patients should avoid eating overly ripe yellow bananas with brown spots. For example, in kidney patients, this is because bananas are rich in potassium, which is excreted by the kidneys. In such bananas, starch is completely converted to simple sugars, causing a sharp spike in blood glucose levels. «Bananas contain a high amount of soluble dietary fiber and sugar alcohols, which can cause bloating and gas, so people with irritable bowel syndrome and bacterial overgrowth should avoid eating them. Therefore, some people recommend completely abstaining from bananas or significantly reducing their intake. Caution is also advised for those taking potassium-sparing diuretics and angiotensin-converting enzyme inhibitors (blood pressure medications)».
