Bananas for boys

My boyfriend and I were having a discussion about how he believed that if a woman eats bananas (before getting pregnant) she’s more likely to have a boy.

We googled this and apparently there was a study done where women with higher calorie diets leading up to pregnancy caused a higher chance of having a boy. While a lower calorie diet increases the odds of a girl.

Anyone ever heard of this? Or think that their diet has influenced the sex of their baby(ies)?