We have praised the goodness of lemon juice multiple times even in our own page. Just like every coin has two sides or faces, everything found in this earth, has its own pros and cons! When used within a limit, all things bring goodness, but when we over-use it, it certainly starts showing its negative sides.
Lemon is no different! We all know how lemon has bleaching properties, and for the same reason, people use it in their skin and teeth! But using lemon juice too much can cause gum related problems.
There are a lot of other negative effects as well. To know more, go through the video.