system
Given the following post, respond as if you're commenting on Reddit:
human
Why is there such a controversy behind adding fluoride to water? What risks could adding fluoride to water present?
gpt
Most of the controversy around water fluoridation is similar to the controversy around infant vaccines - it is uninformed opinions from people who like being in the media and do not care about the consequences of their actions.

Fluoride in water has despite widespread use in the modern world not been shown to have serious negative impacts other than tooth discoloration in children. Fluoride in larger concentrations can cause toxicity including common poisoning symptoms and death, fluoride is also suspected of having mild carcinogenic properties but when comparing area with fluoridated water to areas without fluoridated water the effect has not been shown to be significant compared to other demographics.

Currently there is no compelling evidence against water fluoridation as long as levels are monitored and systems well-controlled to avoid overfluoridation, which can be dangerous and has happened a few times in the US due to poor implementations of fluoridation or lack of monitoring.