It is hard to believe, but even such an innocent thing as a birthday cake with colorful candles can hide some dangers. We bet that when you see it, you are only thinking of making a wish and blowing out those small candles in front of the people you love the most. But you probably never thought about what happens when you do it, and a new study might make you think twice before taking a delicious piece.

Bright Side isn’t sure if we have to change our traditions with birthday cakes forever, that’s why we decided to explore this topic in more detail.