Even though they feel great to drink, they are not that great for your health. There are multiple reasons for the negative effect of soda pops. The first reason is obviously the presence of large quantities of sugar. Not only does this lead to sudden spikes in blood sugar levels, but it also increases the load on the kidneys. Some researchers suggest that even artificial sweeteners can harm the kidney. Another culprit is the preservatives like phosphoric acid and sodium polyphosphate that are commonly found in most of these drinks. Even though the presence of phosphorus might not hurt normal healthy people, it can harm those who have pre-existing kidney conditions.