Here's a few ingredients, which may be harmful if ingested continuously over time.
Aspartame, or Aspartic Acid and Phynelalanine, is used as an artificial sweetener. "Artifical" refers to the lack of this concoction ever appearing normally in nature. In other words, it can only be constructed by human means.
There is a great deal of controversy over this substance, but when researched via the web most pages mysteriously will not load and instead provide a DNS code stating that there is a server problem.
Purportedly, Aspartame is in actuality a neurotoxin, which can cause seizures, Alzheimer's disease, and Dimentia. No irrefutable evidence was found, but it has been linked to an increase of cancerous cells in rats. You can read more about it here. Aspartame
Acesulfame Potassium is another artificial sweetener. Due to many consumers' growing awareness of the dangers of Aspartame, more companies are now using Acesulfame Potassium. It can be found in water flavorers like Mio.
This particular sweetener is known for causing various disorders in children. Much like the information regarding Aspartame, many web pages will not load. Here's one that did.
Stop Killing My Kids
Decide what is right for you by conducting your own research.
Aluminum Sulfate is supposedly a type of filter, but there was a massive controversy in the U.K. not too long ago. You may read about it here. Aluminum Sulfate
The actual use of the substance is unclear.
Sodium Aluminosilicate, supposedly an anti-caking agent, is added to many foods. Like Aluminum Sulfate, it may deposit massive quantities of the toxic metal in the brain. Here's a link to Sodium Aluminosilicate
There are so many chemicals in all of our foods.
Potassium Chloride found in Dasani brand water, and others, is a hazardous chemical, which requires an appearance by the EPA to be cleaned. In other words, whatever reason Dasani claims to have for its use, if the water is spilled it is not supposed to be touched due to the ingredients. Dasani also contains Bromate, a known cancer causing agent.
Again, try your own research.
Finally, outside of foods, there's rat poison/tooth paste.
Sodium Fluoride, the supposed ingredient for healthy teeth is the key ingredient in rat poison. Read about it here