A common part of many people's diet is soda, particularly dark colas. So the question is: are there any soda kidney effects that you need to be aware of? The answer is a resounding yes. There are several ingredients in colas that can lead to forming calcium oxalate crystals. High fructose corn syrup can increase the urinary excretion of oxalate. And frequent consumption can lead to a buildup of oxalates. In addition, high fructose corn syrup has been shown to increase the excretion of uric acid and calcium. The result can be an accumulation of calcium in addition to the oxalates. This combination can eventually lead to the formation of calcium oxalate crystals in the urinary tract.