Genetically Modified Foods
Any food that has been genetically modified, such as some varieties of corn, soy, rice, sugar cane, sugar beets and canola, is not good for people suffering from kidney problems. Such foods can affect the health of your kidneys due to the high levels of oxalates, which bind with calcium in the kidneys to form kidney stones.
A 2009 study published in the International Journal of Biological Science analyzed three types of genetically modified Monsanto corn and found that they had negative health effects on the kidney and liver functioning of rats. The researchers concluded that the three varieties tested created a state of hepatorenal (liver and kidney) toxicity.
Another study published in 2015 in Environmental Health reports that glyphosate-based herbicides, which are the major pesticides used worldwide, pose health risks to the liver and kidneys, although low environmentally relevant doses have not been examined.
Along with genetically modified foods, you must not consume other oxalate-rich foods, including rhubarb, concord grapes, strawberries, sweet potatoes, spinach, summer squash, beets, leeks, tea, coffee, nuts and tofu. Stick to organic foods as much as possible.